diff --git a/Cargo.lock b/Cargo.lock
index 3cde1a2d..7c5bef2d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11,9 +11,9 @@ checksum = "847495c209977a90e8aad588b959d0ca9f5dc228096d29a6bd3defd53f35eaec"
 
 [[package]]
 name = "block-padding"
-version = "0.4.0-pre.3"
+version = "0.4.0-pre.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d07a359e2b51a0e9b9d6a6d4582b7b62723e4a25f4e5ca6be70a6a00050202ab"
+checksum = "e8ab21a8964437caf2e83a92a1221ce65e356a2a9b8b52d58bece04005fe114e"
 dependencies = [
  "hybrid-array",
 ]
@@ -36,9 +36,9 @@ dependencies = [
 
 [[package]]
 name = "cipher"
-version = "0.5.0-pre.1"
+version = "0.5.0-pre.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15e338a2ceb7493b9b89d12728c6feb2d4b61708cb63b577c556c92f43aef0cd"
+checksum = "40619e61d2e7c018604193e71763730a96b0e606e19aba895956635986c7fe98"
 dependencies = [
  "blobby",
  "crypto-common",
@@ -57,9 +57,9 @@ dependencies = [
 
 [[package]]
 name = "crypto-common"
-version = "0.2.0-pre.3"
+version = "0.2.0-pre.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc17eb697364b18256ec92675ebe6b7b153d2f1041e568d74533c5d0fc1ca162"
+checksum = "806e4e3731d44f1340b069551225b44c2056c105cad9e67f0c46266db8a3a6b9"
 dependencies = [
  "getrandom",
  "hybrid-array",
@@ -93,18 +93,18 @@ checksum = "6fe2267d4ed49bc07b63801559be28c718ea06c4738b7a03c94df7386d2cde46"
 
 [[package]]
 name = "hybrid-array"
-version = "0.2.0-pre.8"
+version = "0.2.0-rc.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27fbaf242418fe980caf09ed348d5a6aeabe71fc1bd8bebad641f4591ae0a46d"
+checksum = "b8c5517ac29f08e88170b9647d85cc5f21c2596de177b4867232e20b214b8da1"
 dependencies = [
  "typenum",
 ]
 
 [[package]]
 name = "inout"
-version = "0.2.0-pre.3"
+version = "0.2.0-pre.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96ea9986e1fde8d177cd039f00f9f316d3bfce9ebc2787c1267d4414adf3acb3"
+checksum = "0a2cc35b920cc3b344af824e64e508ffc2c819fc2368ed4d253244446194d2fe"
 dependencies = [
  "block-padding",
  "hybrid-array",
diff --git a/chacha20/Cargo.toml b/chacha20/Cargo.toml
index d33b7473..ffef6fb6 100644
--- a/chacha20/Cargo.toml
+++ b/chacha20/Cargo.toml
@@ -20,13 +20,13 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 cfg-if = "1"
-cipher = "=0.5.0-pre.1"
+cipher = "=0.5.0-pre.2"
 
 [target.'cfg(any(target_arch = "x86_64", target_arch = "x86"))'.dependencies]
 cpufeatures = "0.2"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.1", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.2", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/chacha20/src/xchacha.rs b/chacha20/src/xchacha.rs
index 46b9c653..74e556c6 100644
--- a/chacha20/src/xchacha.rs
+++ b/chacha20/src/xchacha.rs
@@ -185,7 +185,7 @@ mod hchacha20_tests {
             "a0f9e4d58a74a853c12ec41326d3ecdc"
         );
 
-        let actual = hchacha::<U10>(Array::ref_from_slice(&KEY), Array::ref_from_slice(&INPUT));
+        let actual = hchacha::<U10>(Array::from_slice(&KEY), Array::from_slice(&INPUT));
         assert_eq!(actual.as_slice(), &OUTPUT);
     }
 }
diff --git a/hc-256/Cargo.toml b/hc-256/Cargo.toml
index 00dea615..8060c564 100644
--- a/hc-256/Cargo.toml
+++ b/hc-256/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "stream-cipher", "trait"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.1"
+cipher = "=0.5.0-pre.2"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.1", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.2", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/rabbit/Cargo.toml b/rabbit/Cargo.toml
index 537659e8..669b2987 100644
--- a/rabbit/Cargo.toml
+++ b/rabbit/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "rabbit", "stream-cipher", "trait"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.1"
+cipher = "=0.5.0-pre.2"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.1", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.2", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/rc4/Cargo.toml b/rc4/Cargo.toml
index 62497e62..b35170ac 100644
--- a/rc4/Cargo.toml
+++ b/rc4/Cargo.toml
@@ -13,7 +13,7 @@ keywords = ["arc4", "arcfour", "crypto", "stream-cipher", "trait"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.1"
+cipher = "=0.5.0-pre.2"
 
 [dev-dependencies]
 hex-literal = "0.4"
diff --git a/rc4/src/lib.rs b/rc4/src/lib.rs
index 6e4005b9..b3874e9f 100644
--- a/rc4/src/lib.rs
+++ b/rc4/src/lib.rs
@@ -25,7 +25,7 @@
 //! rc4.apply_keystream(&mut data);
 //! assert_eq!(data, [0x10, 0x21, 0xBF, 0x04, 0x20]);
 //!
-//! let key = Key::<U6>::ref_from_slice(b"Secret");
+//! let key = Key::<U6>::from_slice(b"Secret");
 //! let mut rc4 = Rc4::<_>::new(key);
 //! let mut data = b"Attack at dawn".to_vec();
 //! rc4.apply_keystream(&mut data);
diff --git a/rc4/tests/lib.rs b/rc4/tests/lib.rs
index 894b9121..92b44fee 100644
--- a/rc4/tests/lib.rs
+++ b/rc4/tests/lib.rs
@@ -32,7 +32,7 @@ fn test_rfc6229_length_40_bits_key1() {
         "
     );
 
-    let key = Key::<U5>::ref_from_slice(&KEY);
+    let key = Key::<U5>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -74,7 +74,7 @@ fn test_rfc6229_length_56_bits_key1() {
         "
     );
 
-    let key = Key::<U7>::ref_from_slice(&KEY);
+    let key = Key::<U7>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -116,7 +116,7 @@ fn test_rfc6229_length_64_bits_key1() {
         "
     );
 
-    let key = Key::<U8>::ref_from_slice(&KEY);
+    let key = Key::<U8>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -158,7 +158,7 @@ fn test_rfc6229_length_80_bits_key1() {
         "
     );
 
-    let key = Key::<U10>::ref_from_slice(&KEY);
+    let key = Key::<U10>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -201,7 +201,7 @@ fn test_rfc6229_length_128_bits_key1() {
         "
     );
 
-    let key = Key::<U16>::ref_from_slice(&KEY);
+    let key = Key::<U16>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -243,7 +243,7 @@ fn test_rfc6229_length_192_bits_key1() {
         "
     );
 
-    let key = Key::<U24>::ref_from_slice(&KEY);
+    let key = Key::<U24>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -286,7 +286,7 @@ fn test_rfc6229_length_256_bits_key1() {
         "
     );
 
-    let key = Key::<U32>::ref_from_slice(&KEY);
+    let key = Key::<U32>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -328,7 +328,7 @@ fn test_rfc6229_length_40_bits_key2() {
         "
     );
 
-    let key = Key::<U5>::ref_from_slice(&KEY);
+    let key = Key::<U5>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -370,7 +370,7 @@ fn test_rfc6229_length_56_bits_key2() {
         "
     );
 
-    let key = Key::<U7>::ref_from_slice(&KEY);
+    let key = Key::<U7>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -412,7 +412,7 @@ fn test_rfc6229_length_64_bits_key2() {
         "
     );
 
-    let key = Key::<U8>::ref_from_slice(&KEY);
+    let key = Key::<U8>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -454,7 +454,7 @@ fn test_rfc6229_length_80_bits_key2() {
         "
     );
 
-    let key = Key::<U10>::ref_from_slice(&KEY);
+    let key = Key::<U10>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -497,7 +497,7 @@ fn test_rfc6229_length_128_bits_key2() {
         "
     );
 
-    let key = Key::<U16>::ref_from_slice(&KEY);
+    let key = Key::<U16>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -539,7 +539,7 @@ fn test_rfc6229_length_192_bits_key2() {
         "
     );
 
-    let key = Key::<U24>::ref_from_slice(&KEY);
+    let key = Key::<U24>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
@@ -582,7 +582,7 @@ fn test_rfc6229_length_256_bits_key2() {
         "
     );
 
-    let key = Key::<U32>::ref_from_slice(&KEY);
+    let key = Key::<U32>::from_slice(&KEY);
     let mut cipher = Rc4::<_>::new(key);
 
     let mut data = [0u8; 0x1010];
diff --git a/salsa20/Cargo.toml b/salsa20/Cargo.toml
index 965e34b1..8f5da3b2 100644
--- a/salsa20/Cargo.toml
+++ b/salsa20/Cargo.toml
@@ -14,10 +14,10 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 cfg-if = "1"
-cipher = "=0.5.0-pre.1"
+cipher = "=0.5.0-pre.2"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.1", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.2", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]