diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 29d79855e..c20300b28 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -1,4 +1,5 @@
-FROM alpine:3.3
+# FROM alpine:3.3
+FROM alpine@sha256:1849e75e25b5a005781b32e7ce0ec2892c85ef3d40d76861a6d3c721f1acc353
 
 COPY repositories /etc/apk/