diff --git a/mariadb/Dockerfile b/mariadb/Dockerfile
index 1d048265..b6b8023e 100644
--- a/mariadb/Dockerfile
+++ b/mariadb/Dockerfile
@@ -12,6 +12,8 @@ ENV TZ ${TZ}
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone && chown -R mysql:root /var/lib/mysql/
 COPY my.cnf /etc/mysql/conf.d/my.cnf
 
+RUN chmod -R 644 /etc/mysql/conf.d/my.cnf
+
 CMD ["mysqld"]
 
 EXPOSE 3306