diff --git a/Cargo.lock b/Cargo.lock
index 81dbfe03..3f1b2744 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -1826,12 +1826,22 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.13.3"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2796faa41db3ec313a31f7624d9286acf277b52de526150b7e69f3debf891ee5"
+dependencies = [
+ "bytes",
+ "prost-derive 0.13.5",
+]
+
+[[package]]
+name = "prost"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b0487d90e047de87f984913713b85c601c05609aad5b0df4b4573fbf69aa13f"
+checksum = "7231bd9b3d3d33c86b58adbac74b5ec0ad9f496b19d22801d773636feaa95f3d"
 dependencies = [
  "bytes",
- "prost-derive",
+ "prost-derive 0.14.1",
 ]
 
 [[package]]
@@ -1848,7 +1858,7 @@ dependencies = [
  "once_cell",
  "petgraph",
  "prettyplease",
- "prost",
+ "prost 0.13.5",
  "prost-types",
  "regex",
  "syn 2.0.89",
@@ -1857,9 +1867,22 @@ dependencies = [
 
 [[package]]
 name = "prost-derive"
-version = "0.13.3"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a56d757972c98b346a9b766e3f02746cde6dd1cd1d1d563472929fdd74bec4d"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.89",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9552f850d5f0964a4e4d0bf306459ac29323ddfbae05e35a7c0d35cb0803cc5"
+checksum = "9120690fafc389a67ba3803df527d0ec9cbbc9cc45e4cc20b332996dfb672425"
 dependencies = [
  "anyhow",
  "itertools",
@@ -1874,7 +1897,7 @@ version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4759aa0d3a6232fb8dbdb97b61de2c20047c68aca932c7ed76da9d788508d670"
 dependencies = [
- "prost",
+ "prost 0.13.5",
 ]
 
 [[package]]
@@ -2614,7 +2637,7 @@ name = "tink-proto"
 version = "0.3.0"
 dependencies = [
  "base64 0.22.1",
- "prost",
+ "prost 0.14.1",
  "prost-build",
  "serde",
 ]
@@ -2652,7 +2675,7 @@ dependencies = [
  "env_logger",
  "futures",
  "log",
- "prost",
+ "prost 0.14.1",
  "structopt",
  "tink-aead",
  "tink-core",
@@ -2808,7 +2831,7 @@ dependencies = [
  "hyper-util",
  "percent-encoding",
  "pin-project",
- "prost",
+ "prost 0.13.5",
  "socket2 0.5.7",
  "tokio",
  "tokio-stream",
diff --git a/proto/Cargo.toml b/proto/Cargo.toml
index 086e7126..d980af0e 100644
--- a/proto/Cargo.toml
+++ b/proto/Cargo.toml
@@ -18,7 +18,7 @@ json = ["base64", "serde"]
 
 [dependencies]
 base64 = { version = "^0.22", optional = true }
-prost = "^0.13"
+prost = "^0.14"
 serde = { version = "^1.0.203", features = ["derive"], optional = true }
 
 [build-dependencies]
diff --git a/testing/Cargo.toml b/testing/Cargo.toml
index d16408ed..531ffcbf 100644
--- a/testing/Cargo.toml
+++ b/testing/Cargo.toml
@@ -14,7 +14,7 @@ publish = false
 env_logger = "^0.10.1"
 futures = "^0.3.30"
 log = "^0.4.22"
-prost = "^0.13"
+prost = "^0.14"
 structopt = "^0.3.26"
 tink-aead = "^0.3"
 tink-core = { version = "^0.3", features = [