diff --git a/src/rust/engine/Cargo.lock b/src/rust/engine/Cargo.lock
index dc7ecc3a972..c92799b1a5e 100644
--- a/src/rust/engine/Cargo.lock
+++ b/src/rust/engine/Cargo.lock
@@ -475,7 +475,7 @@ version = "0.0.1"
 dependencies = [
  "deepsize",
  "log",
- "prost",
+ "prost 0.11.8",
  "prost-types",
  "serde",
  "serde_derive",
@@ -1064,7 +1064,7 @@ dependencies = [
  "hashing",
  "log",
  "parking_lot 0.12.1",
- "prost",
+ "prost 0.11.8",
  "protos",
  "rand 0.8.5",
  "serde",
@@ -1286,7 +1286,7 @@ dependencies = [
  "parking_lot 0.11.2",
  "pin-project 1.0.12",
  "pin-project-lite",
- "prost",
+ "prost 0.9.0",
  "prost-build",
  "prost-types",
  "rand 0.8.5",
@@ -1872,7 +1872,7 @@ dependencies = [
  "hyper",
  "log",
  "parking_lot 0.12.1",
- "prost",
+ "prost 0.11.8",
  "prost-types",
  "protos",
  "testutil",
@@ -2437,7 +2437,7 @@ dependencies = [
  "nix",
  "once_cell",
  "parking_lot 0.12.1",
- "prost",
+ "prost 0.11.8",
  "prost-types",
  "protos",
  "rand 0.8.5",
@@ -2476,7 +2476,7 @@ dependencies = [
  "hashing",
  "log",
  "process_execution",
- "prost",
+ "prost 0.11.8",
  "protos",
  "remote",
  "shlex",
@@ -2506,7 +2506,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "444879275cb4fd84958b1a1d5420d15e6fcf7c235fe47f053c9c2a80aceb6001"
 dependencies = [
  "bytes",
- "prost-derive",
+ "prost-derive 0.9.0",
+]
+
+[[package]]
+name = "prost"
+version = "0.11.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e48e50df39172a3e7eb17e14642445da64996989bc212b583015435d39a58537"
+dependencies = [
+ "bytes",
+ "prost-derive 0.11.8",
 ]
 
 [[package]]
@@ -2522,7 +2532,7 @@ dependencies = [
  "log",
  "multimap",
  "petgraph",
- "prost",
+ "prost 0.9.0",
  "prost-types",
  "regex",
  "tempfile",
@@ -2542,6 +2552,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "prost-derive"
+version = "0.11.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ea9b0f8cbe5e15a8a042d030bd96668db28ecb567ec37d691971ff5731d2b1b"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "prost-types"
 version = "0.9.0"
@@ -2549,7 +2572,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "534b7a0e836e3c482d2693070f982e39e7611da9695d4d1f5a4b186b51faef0a"
 dependencies = [
  "bytes",
- "prost",
+ "prost 0.9.0",
 ]
 
 [[package]]
@@ -2558,7 +2581,7 @@ version = "0.0.1"
 dependencies = [
  "bytes",
  "hashing",
- "prost",
+ "prost 0.9.0",
  "prost-build",
  "prost-types",
  "tonic",
@@ -2820,7 +2843,7 @@ dependencies = [
  "once_cell",
  "parking_lot 0.12.1",
  "process_execution",
- "prost",
+ "prost 0.11.8",
  "prost-types",
  "protos",
  "rand 0.8.5",
@@ -3286,7 +3309,7 @@ dependencies = [
  "mock",
  "num_cpus",
  "parking_lot 0.12.1",
- "prost",
+ "prost 0.11.8",
  "prost-types",
  "protos",
  "serde",
@@ -3441,7 +3464,7 @@ dependencies = [
  "fs",
  "grpc_util",
  "hashing",
- "prost",
+ "prost 0.11.8",
  "protos",
 ]
 
@@ -3668,8 +3691,8 @@ dependencies = [
  "hyper-timeout",
  "percent-encoding",
  "pin-project 1.0.12",
- "prost",
- "prost-derive",
+ "prost 0.9.0",
+ "prost-derive 0.9.0",
  "rustls-native-certs",
  "tokio",
  "tokio-rustls 0.22.0",
diff --git a/src/rust/engine/concrete_time/Cargo.toml b/src/rust/engine/concrete_time/Cargo.toml
index f99f734aa9f..7df689c44e3 100644
--- a/src/rust/engine/concrete_time/Cargo.toml
+++ b/src/rust/engine/concrete_time/Cargo.toml
@@ -9,7 +9,7 @@ publish = false
 # TODO: Waiting on https://github.com/Aeledfyr/deepsize/pull/{30,31,32}.
 deepsize = { git = "https://github.com/stuhood/deepsize.git", rev = "5c8bee5443fcafe4aaa9274490d354412d0955c1" }
 log = "0.4"
-prost = "0.9"
+prost = "0.11"
 prost-types = "0.9"
 serde = "1.0.136"
 serde_derive = "1.0.98"
diff --git a/src/rust/engine/fs/fs_util/Cargo.toml b/src/rust/engine/fs/fs_util/Cargo.toml
index 672979deb9e..d270e977635 100644
--- a/src/rust/engine/fs/fs_util/Cargo.toml
+++ b/src/rust/engine/fs/fs_util/Cargo.toml
@@ -16,7 +16,7 @@ futures = "0.3"
 hashing = { path = "../../hashing" }
 log = "0.4"
 parking_lot = "0.12"
-prost = "0.9"
+prost = "0.11"
 rand = "0.8"
 serde = "1.0"
 serde_json = "1.0"
diff --git a/src/rust/engine/fs/store/Cargo.toml b/src/rust/engine/fs/store/Cargo.toml
index a8f785de6c6..731abd569ba 100644
--- a/src/rust/engine/fs/store/Cargo.toml
+++ b/src/rust/engine/fs/store/Cargo.toml
@@ -27,7 +27,7 @@ log = "0.4"
 madvise = "0.1"
 memmap = "0.7"
 parking_lot = "0.12"
-prost = "0.9"
+prost = "0.11"
 prost-types = "0.9"
 serde = "1.0"
 serde_derive = "1.0"
diff --git a/src/rust/engine/process_execution/Cargo.toml b/src/rust/engine/process_execution/Cargo.toml
index fb4c5b4bb44..bc5905cc106 100644
--- a/src/rust/engine/process_execution/Cargo.toml
+++ b/src/rust/engine/process_execution/Cargo.toml
@@ -44,7 +44,7 @@ itertools = "0.10"
 serde = "1.0.136"
 bincode = "1.3.3"
 once_cell = "1.15"
-prost = "0.9"
+prost = "0.11"
 prost-types = "0.9"
 rand = "0.8"
 strum = "0.24"
diff --git a/src/rust/engine/process_execution/remote/Cargo.toml b/src/rust/engine/process_execution/remote/Cargo.toml
index d0de8fcb26e..6c285756437 100644
--- a/src/rust/engine/process_execution/remote/Cargo.toml
+++ b/src/rust/engine/process_execution/remote/Cargo.toml
@@ -29,7 +29,7 @@ tokio-util = { version = "0.7", features = ["codec"] }
 workunit_store = { path = "../../workunit_store" }
 async-oncecell = "0.2"
 once_cell = "1.15"
-prost = "0.9"
+prost = "0.11"
 prost-types = "0.9"
 rand = "0.8"
 tonic = { version = "0.6", features = ["transport", "codegen", "tls", "tls-roots", "prost"] }
diff --git a/src/rust/engine/process_executor/Cargo.toml b/src/rust/engine/process_executor/Cargo.toml
index 819becd3533..9c1d2d85bb9 100644
--- a/src/rust/engine/process_executor/Cargo.toml
+++ b/src/rust/engine/process_executor/Cargo.toml
@@ -16,7 +16,7 @@ grpc_util = { path = "../grpc_util" }
 hashing = { path = "../hashing" }
 log = "0.4"
 process_execution = { path = "../process_execution" }
-prost = "0.9"
+prost = "0.11"
 shlex = "1.1.0"
 store = { path = "../fs/store" }
 task_executor = { path = "../task_executor" }
diff --git a/src/rust/engine/testutil/Cargo.toml b/src/rust/engine/testutil/Cargo.toml
index 3bb3f267196..2b4cb3462ca 100644
--- a/src/rust/engine/testutil/Cargo.toml
+++ b/src/rust/engine/testutil/Cargo.toml
@@ -11,5 +11,5 @@ bytes = "1.2"
 fs = { path = "../fs" }
 grpc_util = { path = "../grpc_util" }
 hashing = { path = "../hashing" }
-prost = "0.9" 
+prost = "0.11" 
 protos = { path = "../protos" }
diff --git a/src/rust/engine/testutil/mock/Cargo.toml b/src/rust/engine/testutil/mock/Cargo.toml
index 90f56e129b7..b08f60d03a7 100644
--- a/src/rust/engine/testutil/mock/Cargo.toml
+++ b/src/rust/engine/testutil/mock/Cargo.toml
@@ -14,7 +14,7 @@ hashing = { path = "../../hashing" }
 hyper = { version = "0.14", features = ["stream", "tcp"] }
 log = "0.4"
 parking_lot = "0.12"
-prost = "0.9"
+prost = "0.11"
 prost-types = "0.9"
 protos = { path = "../../protos" }
 testutil = { path = ".." }