diff --git a/service/Dockerfile b/service/Dockerfile
index 0547426..0845193 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:b8acb708932b375e9078009a40862b75ee2051f5e8b654076a660a1d5effbe45
 CMD ["cat", "dog.json"]