diff --git a/basic_contract_caller/Cargo.toml b/basic_contract_caller/Cargo.toml
index fc4a7f93..2428652f 100755
--- a/basic_contract_caller/Cargo.toml
+++ b/basic_contract_caller/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
@@ -17,7 +17,7 @@ scale-info = { version = "2.5", default-features = false, features = ["derive"],
 other_contract = { path = "other_contract", default-features = false, features = ["ink-as-dependency"] }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/basic_contract_caller/other_contract/Cargo.toml b/basic_contract_caller/other_contract/Cargo.toml
index 70a068ed..dbdd5387 100755
--- a/basic_contract_caller/other_contract/Cargo.toml
+++ b/basic_contract_caller/other_contract/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { path = "../../../crates/e2e" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/call-runtime/Cargo.toml b/call-runtime/Cargo.toml
index c9d7540a..e308b271 100644
--- a/call-runtime/Cargo.toml
+++ b/call-runtime/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false, features = ["call-runtime"] }
+ink = { version = "4.2.0", default-features = false, features = ["call-runtime"] }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
@@ -21,7 +21,7 @@ sp-io = { version = "22.0.0", default-features = false, features = ["disable_pan
 sp-runtime = { version = "23.0.0", default-features = false }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/conditional-compilation/Cargo.toml b/conditional-compilation/Cargo.toml
index 7b0d0111..4f37c84d 100755
--- a/conditional-compilation/Cargo.toml
+++ b/conditional-compilation/Cargo.toml
@@ -5,13 +5,13 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/contract-terminate/Cargo.toml b/contract-terminate/Cargo.toml
index 5dd0b994..3f24a440 100644
--- a/contract-terminate/Cargo.toml
+++ b/contract-terminate/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/contract-transfer/Cargo.toml b/contract-transfer/Cargo.toml
index 976f3ff6..3efc6394 100644
--- a/contract-transfer/Cargo.toml
+++ b/contract-transfer/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/custom-environment/Cargo.toml b/custom-environment/Cargo.toml
index 43030d99..edf8f8b7 100644
--- a/custom-environment/Cargo.toml
+++ b/custom-environment/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/custom_allocator/Cargo.toml b/custom_allocator/Cargo.toml
index 56ccd1ed..2fa8c830 100755
--- a/custom_allocator/Cargo.toml
+++ b/custom_allocator/Cargo.toml
@@ -8,7 +8,7 @@ publish = false
 [dependencies]
 # We're going to use a different allocator than the one provided by ink!. To do that we
 # first need to disable the included memory allocator.
-ink = { version = "4.2", default-features = false, features = ["no-allocator"]  }
+ink = { version = "4.2.0", default-features = false, features = ["no-allocator"]  }
 
 # This is going to be our new global memory allocator.
 dlmalloc = {version = "0.2", default-features = false, features = ["global"] }
@@ -17,7 +17,7 @@ scale = { package = "parity-scale-codec", version = "3", default-features = fals
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/delegator/Cargo.toml b/delegator/Cargo.toml
index 403e4a12..9cf82c6e 100644
--- a/delegator/Cargo.toml
+++ b/delegator/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "delegator"
-version = "4.1.0"
+version = "4.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
@@ -15,24 +15,23 @@ adder = { path = "adder", default-features = false, features = ["ink-as-dependen
 subber = { path = "subber", default-features = false, features = ["ink-as-dependency"] }
 accumulator = { path = "accumulator", default-features = false, features = ["ink-as-dependency"] }
 
+
 [dev-dependencies]
-ink_e2e = { version = "4.1" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 name = "delegator"
 path = "lib.rs"
-crate-type = ["cdylib"]
 
 [features]
 default = ["std"]
 std = [
-    "ink/std",
-    "scale/std",
-    "scale-info/std",
-
-    "adder/std",
-    "subber/std",
-    "accumulator/std",
+    "ink/std", 
+    "scale/std", 
+    "scale-info/std", 
+    "adder/std", 
+    "subber/std", 
+    "accumulator/std"
 ]
 ink-as-dependency = []
 e2e-tests = []
diff --git a/delegator/accumulator/Cargo.toml b/delegator/accumulator/Cargo.toml
index da0d2bec..4b50c012 100644
--- a/delegator/accumulator/Cargo.toml
+++ b/delegator/accumulator/Cargo.toml
@@ -1,23 +1,17 @@
 [package]
 name = "accumulator"
-version = "4.1.0"
+version = "4.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "accumulator"
 path = "lib.rs"
-crate-type = [
-    # Used for normal contract Wasm blobs.
-    "cdylib",
-    # Used for ABI generation.
-    "rlib",
-]
 
 [features]
 default = ["std"]
@@ -26,4 +20,4 @@ std = [
     "scale/std",
     "scale-info/std",
 ]
-ink-as-dependency = []
+ink-as-dependency = []
\ No newline at end of file
diff --git a/delegator/accumulator/lib.rs b/delegator/accumulator/lib.rs
index 244ad388..9986f4dc 100644
--- a/delegator/accumulator/lib.rs
+++ b/delegator/accumulator/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 pub use self::accumulator::{
     Accumulator,
diff --git a/delegator/adder/Cargo.toml b/delegator/adder/Cargo.toml
index be362ad2..3fc259cf 100644
--- a/delegator/adder/Cargo.toml
+++ b/delegator/adder/Cargo.toml
@@ -1,11 +1,11 @@
 [package]
 name = "adder"
-version = "4.1.0"
+version = "4.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 accumulator = { path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
@@ -15,12 +15,6 @@ scale-info = { version = "2.3", default-features = false, features = ["derive"],
 [lib]
 name = "adder"
 path = "lib.rs"
-crate-type = [
-    # Used for normal contract Wasm blobs.
-    "cdylib",
-    # Used for ABI generation.
-    "rlib",
-]
 
 [features]
 default = ["std"]
diff --git a/delegator/adder/lib.rs b/delegator/adder/lib.rs
index 839915c6..72529d7d 100644
--- a/delegator/adder/lib.rs
+++ b/delegator/adder/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 pub use self::adder::{
     Adder,
diff --git a/delegator/build-all.sh b/delegator/build-all.sh
index 9597fc71..c0eb6acb 100755
--- a/delegator/build-all.sh
+++ b/delegator/build-all.sh
@@ -2,7 +2,7 @@
 
 set -eu
 
-cargo +stable contract build --manifest-path accumulator/Cargo.toml
-cargo +stable contract build --manifest-path adder/Cargo.toml
-cargo +stable contract build --manifest-path subber/Cargo.toml
-cargo +stable contract build
+cargo contract build --manifest-path accumulator/Cargo.toml --release
+cargo contract build --manifest-path adder/Cargo.toml --release
+cargo contract build --manifest-path subber/Cargo.toml --release
+cargo contract build --release
diff --git a/delegator/lib.rs b/delegator/lib.rs
index 880c3dcb..c546df91 100644
--- a/delegator/lib.rs
+++ b/delegator/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 #[ink::contract]
 mod delegator {
diff --git a/delegator/subber/Cargo.toml b/delegator/subber/Cargo.toml
index bc0ab985..8dc6707c 100644
--- a/delegator/subber/Cargo.toml
+++ b/delegator/subber/Cargo.toml
@@ -1,11 +1,11 @@
 [package]
 name = "subber"
-version = "4.1.0"
+version = "4.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 accumulator = { path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
@@ -15,12 +15,6 @@ scale-info = { version = "2.3", default-features = false, features = ["derive"],
 [lib]
 name = "subber"
 path = "lib.rs"
-crate-type = [
-    # Used for normal contract Wasm blobs.
-    "cdylib",
-    # Used for ABI generation.
-    "rlib",
-]
 
 [features]
 default = ["std"]
diff --git a/delegator/subber/lib.rs b/delegator/subber/lib.rs
index 37629aca..aee051bf 100644
--- a/delegator/subber/lib.rs
+++ b/delegator/subber/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 pub use self::subber::{
     Subber,
diff --git a/dns/Cargo.toml b/dns/Cargo.toml
index 3478583b..c8a6c142 100644
--- a/dns/Cargo.toml
+++ b/dns/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/e2e-call-runtime/Cargo.toml b/e2e-call-runtime/Cargo.toml
index 12ae5c9f..16bb45d1 100644
--- a/e2e-call-runtime/Cargo.toml
+++ b/e2e-call-runtime/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 subxt = { version = "0.28.0", default-features = false }
 
 [lib]
diff --git a/erc1155/Cargo.toml b/erc1155/Cargo.toml
index 826b6787..c3dd9d89 100644
--- a/erc1155/Cargo.toml
+++ b/erc1155/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/erc20/Cargo.toml b/erc20/Cargo.toml
index d8aed9d6..0f01ab7f 100644
--- a/erc20/Cargo.toml
+++ b/erc20/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/erc721/Cargo.toml b/erc721/Cargo.toml
index 374cc2fa..74bd5f53 100644
--- a/erc721/Cargo.toml
+++ b/erc721/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/flipper/Cargo.toml b/flipper/Cargo.toml
index 2e7e31ed..1af1726b 100644
--- a/flipper/Cargo.toml
+++ b/flipper/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/incrementer/Cargo.toml b/incrementer/Cargo.toml
index b5ecaf28..0544f6ed 100644
--- a/incrementer/Cargo.toml
+++ b/incrementer/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/multi_contract_caller/Cargo.toml b/multi_contract_caller/Cargo.toml
index 14269e91..decf3bf8 100644
--- a/multi_contract_caller/Cargo.toml
+++ b/multi_contract_caller/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
@@ -16,7 +16,7 @@ subber = { path = "subber", default-features = false, features = ["ink-as-depend
 accumulator = { path = "accumulator", default-features = false, features = ["ink-as-dependency"] }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
@@ -27,7 +27,6 @@ std = [
     "ink/std",
     "scale/std",
     "scale-info/std",
-
     "adder/std",
     "subber/std",
     "accumulator/std",
diff --git a/multi_contract_caller/accumulator/Cargo.toml b/multi_contract_caller/accumulator/Cargo.toml
index 5492ca97..6d107f91 100644
--- a/multi_contract_caller/accumulator/Cargo.toml
+++ b/multi_contract_caller/accumulator/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
diff --git a/multi_contract_caller/adder/Cargo.toml b/multi_contract_caller/adder/Cargo.toml
index 616945b0..75b2e7c3 100644
--- a/multi_contract_caller/adder/Cargo.toml
+++ b/multi_contract_caller/adder/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 accumulator = { path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
@@ -21,7 +21,6 @@ std = [
     "ink/std",
     "scale/std",
     "scale-info/std",
-
     "accumulator/std",
 ]
 ink-as-dependency = []
diff --git a/multi_contract_caller/subber/Cargo.toml b/multi_contract_caller/subber/Cargo.toml
index 8579d13b..f6882316 100644
--- a/multi_contract_caller/subber/Cargo.toml
+++ b/multi_contract_caller/subber/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 accumulator = { path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
@@ -21,7 +21,6 @@ std = [
     "ink/std",
     "scale/std",
     "scale-info/std",
-
     "accumulator/std",
 ]
 ink-as-dependency = []
diff --git a/multisig/Cargo.toml b/multisig/Cargo.toml
index 5ce04f3c..d98ffc25 100755
--- a/multisig/Cargo.toml
+++ b/multisig/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/payment-channel/Cargo.toml b/payment-channel/Cargo.toml
index 9047b33e..438fc60b 100755
--- a/payment-channel/Cargo.toml
+++ b/payment-channel/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"] }
diff --git a/psp22-extension/Cargo.toml b/psp22-extension/Cargo.toml
index 37bfe380..5fd1ff5e 100755
--- a/psp22-extension/Cargo.toml
+++ b/psp22-extension/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/rand-extension/contract/Cargo.toml b/rand-extension/contract/Cargo.toml
index 51092957..79329706 100644
--- a/rand-extension/contract/Cargo.toml
+++ b/rand-extension/contract/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"] }
 rand_extension = { version = "1.0.0", path = "../rand_extension", default-features = false  }
diff --git a/rand-extension/rand_extension/Cargo.toml b/rand-extension/rand_extension/Cargo.toml
index c505f8b5..4053eb7e 100644
--- a/rand-extension/rand_extension/Cargo.toml
+++ b/rand-extension/rand_extension/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"] }
 
diff --git a/set_code_hash/Cargo.toml b/set_code_hash/Cargo.toml
index 1fa036bd..059d17cb 100644
--- a/set_code_hash/Cargo.toml
+++ b/set_code_hash/Cargo.toml
@@ -6,13 +6,13 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 
 [lib]
 path = "lib.rs"
diff --git a/set_code_hash/updated_incrementer/Cargo.toml b/set_code_hash/updated_incrementer/Cargo.toml
index dfafa9b7..2a4bcbda 100644
--- a/set_code_hash/updated_incrementer/Cargo.toml
+++ b/set_code_hash/updated_incrementer/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-dyn-cross-contract-calls/Cargo.toml b/trait-dyn-cross-contract-calls/Cargo.toml
index bdab930d..f5bc1c2c 100644
--- a/trait-dyn-cross-contract-calls/Cargo.toml
+++ b/trait-dyn-cross-contract-calls/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
@@ -14,7 +14,7 @@ scale-info = { version = "2.5", default-features = false, features = ["derive"],
 dyn-traits = { path = "./traits", default-features = false }
 
 [dev-dependencies]
-ink_e2e = { version = "4.2" }
+ink_e2e = { version = "4.2.0" }
 trait-incrementer = { path = "./contracts/incrementer", default-features = false, features = ["ink-as-dependency"] }
 
 [lib]
@@ -26,7 +26,6 @@ std = [
     "ink/std",
     "scale/std",
     "scale-info/std",
-
     "dyn-traits/std",
 ]
 e2e-tests = []
diff --git a/trait-dyn-cross-contract-calls/contracts/incrementer/Cargo.toml b/trait-dyn-cross-contract-calls/contracts/incrementer/Cargo.toml
index 0cf71da9..223be4f4 100644
--- a/trait-dyn-cross-contract-calls/contracts/incrementer/Cargo.toml
+++ b/trait-dyn-cross-contract-calls/contracts/incrementer/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { path = "../../../../crates/ink", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-dyn-cross-contract-calls/traits/Cargo.toml b/trait-dyn-cross-contract-calls/traits/Cargo.toml
index 008bd5fb..bd0a7d33 100644
--- a/trait-dyn-cross-contract-calls/traits/Cargo.toml
+++ b/trait-dyn-cross-contract-calls/traits/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-erc20/Cargo.toml b/trait-erc20/Cargo.toml
index 796a309d..174f04eb 100644
--- a/trait-erc20/Cargo.toml
+++ b/trait-erc20/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-flipper/Cargo.toml b/trait-flipper/Cargo.toml
index 18e20094..ead54e42 100644
--- a/trait-flipper/Cargo.toml
+++ b/trait-flipper/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-incrementer/Cargo.toml b/trait-incrementer/Cargo.toml
index 9afb3e94..c04baeff 100644
--- a/trait-incrementer/Cargo.toml
+++ b/trait-incrementer/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
diff --git a/trait-incrementer/traits/Cargo.toml b/trait-incrementer/traits/Cargo.toml
index e4080988..53b7b4c8 100644
--- a/trait-incrementer/traits/Cargo.toml
+++ b/trait-incrementer/traits/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.2", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
@@ -14,7 +14,6 @@ scale-info = { version = "2.5", default-features = false, features = ["derive"],
 [lib]
 name = "traits"
 path = "lib.rs"
-crate-type = ["rlib"]
 
 [features]
 default = ["std"]
diff --git a/upgradeable-contracts/forward-calls/Cargo.toml b/upgradeable-contracts/forward-calls/Cargo.toml
index 3e6106c0..01ff51e9 100644
--- a/upgradeable-contracts/forward-calls/Cargo.toml
+++ b/upgradeable-contracts/forward-calls/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "forward_calls"
-version = "4.1.0"
+version = "4.2.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 publish = false
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
@@ -14,7 +14,6 @@ scale-info = { version = "2.3", default-features = false, features = ["derive"],
 [lib]
 name = "forward_calls"
 path = "lib.rs"
-crate-type = ["cdylib"]
 
 [features]
 default = ["std"]
diff --git a/upgradeable-contracts/forward-calls/lib.rs b/upgradeable-contracts/forward-calls/lib.rs
index d65c5111..d1885dbb 100644
--- a/upgradeable-contracts/forward-calls/lib.rs
+++ b/upgradeable-contracts/forward-calls/lib.rs
@@ -13,7 +13,7 @@
 //! Note though that the contract to which calls are forwarded still
 //! contains it's own state.
 
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 #[ink::contract]
 pub mod proxy {
diff --git a/upgradeable-contracts/set-code-hash/Cargo.toml b/upgradeable-contracts/set-code-hash/Cargo.toml
index 18ca6cdf..c27abf00 100644
--- a/upgradeable-contracts/set-code-hash/Cargo.toml
+++ b/upgradeable-contracts/set-code-hash/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "incrementer"
-version = "4.1.0"
+version = "4.2.0"
 edition = "2021"
 authors = ["Parity Technologies <admin@parity.io>"]
 publish = false
@@ -8,7 +8,7 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
@@ -16,7 +16,6 @@ scale-info = { version = "2.3", default-features = false, features = ["derive"],
 [lib]
 name = "incrementer"
 path = "lib.rs"
-crate-type = ["cdylib"]
 
 [features]
 default = ["std"]
diff --git a/upgradeable-contracts/set-code-hash/lib.rs b/upgradeable-contracts/set-code-hash/lib.rs
index ce36570a..4f733a3c 100644
--- a/upgradeable-contracts/set-code-hash/lib.rs
+++ b/upgradeable-contracts/set-code-hash/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 #[ink::contract]
 pub mod incrementer {
diff --git a/upgradeable-contracts/set-code-hash/updated-incrementer/Cargo.toml b/upgradeable-contracts/set-code-hash/updated-incrementer/Cargo.toml
index 3c1e4041..2bb53e8d 100644
--- a/upgradeable-contracts/set-code-hash/updated-incrementer/Cargo.toml
+++ b/upgradeable-contracts/set-code-hash/updated-incrementer/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "updated-incrementer"
-version = "4.1.0"
+version = "4.2.0"
 edition = "2021"
 authors = ["Parity Technologies <admin@parity.io>"]
 publish = false
@@ -8,7 +8,7 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-ink = { version = "4.1", default-features = false }
+ink = { version = "4.2.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
@@ -16,7 +16,6 @@ scale-info = { version = "2.3", default-features = false, features = ["derive"],
 [lib]
 name = "updated_incrementer"
 path = "lib.rs"
-crate-type = ["cdylib"]
 
 [features]
 default = ["std"]
diff --git a/upgradeable-contracts/set-code-hash/updated-incrementer/lib.rs b/upgradeable-contracts/set-code-hash/updated-incrementer/lib.rs
index de2b517c..3bd37166 100644
--- a/upgradeable-contracts/set-code-hash/updated-incrementer/lib.rs
+++ b/upgradeable-contracts/set-code-hash/updated-incrementer/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(not(feature = "std"), no_std, no_main)]
 
 #[ink::contract]
 pub mod incrementer {