diff --git a/examples/deployment/docker/db_server/Dockerfile b/examples/deployment/docker/db_server/Dockerfile
index 7279dc532b..2511581f7e 100644
--- a/examples/deployment/docker/db_server/Dockerfile
+++ b/examples/deployment/docker/db_server/Dockerfile
@@ -3,5 +3,5 @@ FROM gcr.io/trillian-opensource-ci/mysql5:5.7
 # expects the build context to be: $GOPATH/src/github.com/google/trillian
 COPY examples/deployment/docker/db_server/mysql.cnf /etc/mysql/conf.d/trillian.cnf
 COPY storage/mysql/schema/storage.sql /docker-entrypoint-initdb.d/storage.sql
-RUN chmod -R 775 /docker-entrypoint-initdb.d
-
+RUN chmod -R 775 /docker-entrypoint-initdb.d && \
+    chmod 644 /etc/mysql/conf.d/trillian.cnf