diff --git a/Dockerfile b/Dockerfile
index 090b667..e80de1d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine/git:latest
+FROM alpine/git@sha256:1283cf559e7fa83951f25b292394dc7bac783e12e2c0353ddda8e3c51583d10f
 
 LABEL "com.github.actions.name"="Mirror Repository"
 LABEL "com.github.actions.description"="Automate mirroring of git commits to another repository"