diff --git a/protobuf/build.gradle b/protobuf/build.gradle
index 728edd8..20f3c9c 100644
--- a/protobuf/build.gradle
+++ b/protobuf/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-  id "com.google.protobuf" version "0.8.14"
+  id "com.google.protobuf" version "0.9.1"
 }
 
 dependencies {