diff --git a/Cargo.lock b/Cargo.lock
index b77b1631..4ef383a4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1631,6 +1631,16 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a41cf62165e97c7f814d2221421dbb9afcbcdb0a88068e5ea206e19951c2cbb5"
+dependencies = [
+ "proc-macro2",
+ "syn 2.0.46",
+]
+
 [[package]]
 name = "primeorder"
 version = "0.13.0"
@@ -1680,7 +1690,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b82eaa1d779e9a4bc1c3217db8ffbeabaae1dca241bf70183242128d48681cd"
 dependencies = [
  "bytes",
- "prost-derive",
+ "prost-derive 0.11.9",
+]
+
+[[package]]
+name = "prost"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "146c289cda302b98a28d40c8b3b90498d6e526dd24ac2ecea73e4e491685b94a"
+dependencies = [
+ "bytes",
+ "prost-derive 0.12.3",
 ]
 
 [[package]]
@@ -1696,15 +1716,37 @@ dependencies = [
  "log",
  "multimap",
  "petgraph",
- "prettyplease",
- "prost",
- "prost-types",
+ "prettyplease 0.1.24",
+ "prost 0.11.9",
+ "prost-types 0.11.9",
  "regex",
  "syn 1.0.109",
  "tempfile",
  "which",
 ]
 
+[[package]]
+name = "prost-build"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c55e02e35260070b6f716a2423c2ff1c3bb1642ddca6f99e1f26d06268a0e2d2"
+dependencies = [
+ "bytes",
+ "heck 0.4.1",
+ "itertools",
+ "log",
+ "multimap",
+ "once_cell",
+ "petgraph",
+ "prettyplease 0.2.16",
+ "prost 0.12.3",
+ "prost-types 0.12.3",
+ "regex",
+ "syn 2.0.46",
+ "tempfile",
+ "which",
+]
+
 [[package]]
 name = "prost-derive"
 version = "0.11.9"
@@ -1718,13 +1760,35 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "prost-derive"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efb6c9a1dd1def8e2124d17e83a20af56f1570d6c2d2bd9e266ccb768df3840e"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.46",
+]
+
 [[package]]
 name = "prost-types"
 version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "213622a1460818959ac1181aaeb2dc9c7f63df720db7d788b3e24eacd1983e13"
 dependencies = [
- "prost",
+ "prost 0.11.9",
+]
+
+[[package]]
+name = "prost-types"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "193898f59edcf43c26227dcd4c8427f00d99d61e95dcde58dabd49fa291d470e"
+dependencies = [
+ "prost 0.12.3",
 ]
 
 [[package]]
@@ -2442,8 +2506,8 @@ name = "tink-proto"
 version = "0.2.5"
 dependencies = [
  "base64 0.21.7",
- "prost",
- "prost-build",
+ "prost 0.11.9",
+ "prost-build 0.11.9",
  "serde",
 ]
 
@@ -2480,7 +2544,7 @@ dependencies = [
  "env_logger",
  "futures",
  "log",
- "prost",
+ "prost 0.11.9",
  "structopt",
  "tink-aead",
  "tink-core",
@@ -2647,7 +2711,7 @@ dependencies = [
  "hyper-timeout",
  "percent-encoding",
  "pin-project",
- "prost",
+ "prost 0.11.9",
  "tokio",
  "tokio-stream",
  "tower",
@@ -2658,15 +2722,15 @@ dependencies = [
 
 [[package]]
 name = "tonic-build"
-version = "0.8.4"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bf5e9b9c0f7e0a7c027dcfaba7b2c60816c7049171f679d99ee2ff65d0de8c4"
+checksum = "be4ef6dd70a610078cb4e338a0f79d06bc759ff1b22d2120c2ff02ae264ba9c2"
 dependencies = [
- "prettyplease",
+ "prettyplease 0.2.16",
  "proc-macro2",
- "prost-build",
+ "prost-build 0.12.3",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.46",
 ]
 
 [[package]]
diff --git a/testing/Cargo.toml b/testing/Cargo.toml
index 97e7d908..417fe0e1 100644
--- a/testing/Cargo.toml
+++ b/testing/Cargo.toml
@@ -37,4 +37,4 @@ tokio = { version = "^1.16", features = [
 tonic = "^0.9"
 
 [build-dependencies]
-tonic-build = "^0.8"
+tonic-build = "^0.11"