diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 172a353..1f3760e 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -2,7 +2,7 @@ FROM jenkins/jenkins:alpine
 
 USER root
 RUN addgroup --gid 281 docker
-RUN usermod -aG docker jenkins
+RUN addgroup jenkins docker
 
 RUN apk add --no-cache docker docker-compose