diff --git a/Dockerfile b/Dockerfile
index bb4a185..2d61258 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
-FROM drinternet/rsync:v1.4.4
+# drinternet/rsync@v1.4.4
+FROM drinternet/rsync@sha256:15b2949838074bd93c49421c22380396a0cd53a322439e799ac87afcadcfe234
 
 # Copy entrypoint
 COPY entrypoint.sh /entrypoint.sh