diff --git a/service/Dockerfile b/service/Dockerfile
index 0547426..9afbcb7 100644
--- a/service/Dockerfile
+++ b/service/Dockerfile
@@ -1,3 +1,3 @@
-FROM 111664719423.dkr.ecr.us-east-1.amazonaws.com/base:latest
+FROM 111664719423.dkr.ecr.us-east-1.amazonaws.com/base:latest@sha256:d6eecd3d84c2e4abbe9e7625b61069547cfaa70367597ed4123390bc2decffb5
 CMD ["cat", "dog.json"]