diff --git a/.setup/Dockerfile b/.setup/Dockerfile
index 2adac3a..7c6cdd6 100644
--- a/.setup/Dockerfile
+++ b/.setup/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:18.04@sha256:152dc042452c496007f07ca9127571cb9c29697f42acbfad72324b2bb2e43c98
 MAINTAINER Ilya Ageev <iamuyga@gmail.com>
 
 ENV MYSQL_ROOT_PASSWORD root