diff --git a/Dockerfile.build b/Dockerfile.build
index 82536f9..86ee126 100644
--- a/Dockerfile.build
+++ b/Dockerfile.build
@@ -1,4 +1,4 @@
-FROM maven:3.6.3-jdk-8
+FROM maven:3.6.3-jdk-8@sha256:ac624d39dd0b7bed827d4b0d1bbaeb457012e0cba0fb6c53ce34b00bed16ec08
 LABEL maintainer="Shivakumar Ningappa <shivagowda@gmail.com>"