diff --git a/java/proto/build.gradle.kts b/java/proto/build.gradle.kts
index 4de35ff4..3a659bd5 100644
--- a/java/proto/build.gradle.kts
+++ b/java/proto/build.gradle.kts
@@ -6,7 +6,7 @@ import subzero.DependencyVersions
 
 plugins {
     id("com.squareup.subzero.java-conventions")
-    id("com.google.protobuf") version "0.9.4"
+    id("com.google.protobuf") version "0.9.5"
 }
 
 dependencies {