diff --git a/groupcache-pb/Cargo.toml b/groupcache-pb/Cargo.toml
index 388c98a..e537127 100644
--- a/groupcache-pb/Cargo.toml
+++ b/groupcache-pb/Cargo.toml
@@ -18,4 +18,4 @@ tonic-prost = "0.14.2"
 tonic-prost-build = { version = "0.14.2" }
 
 [build-dependencies]
-tonic-prost-build = "*"
\ No newline at end of file
+tonic-prost-build = { version = "0.14.2" }
\ No newline at end of file