diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a9737bd..6c47b6b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,7 +11,7 @@ cache:
     - .gradle/
 
 protoc_gen:
-  image: vato.ddns.net:8083/gradle
+  image: vato.ddns.net:8083/gradle:6.7.1
   stage: protoc
   rules:
     - changes: