diff --git a/Dockerfile b/Dockerfile
index 0c9300a..af41829 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,10 +32,12 @@ VOLUME ["/var/lib/mysql"]
 
 # set environment variables
 ENV TZ=Etc/UTC
-ENV UID=8100
-ENV GID=8100
+ENV MYSQL_UID=8100
+ENV MYSQL_GID=8100
 ENV MYSQL_ROOT_PASSWORD=''
 ENV MYSQL_DATABASE='myData'
+ENV MYSQL_CHARSET='utf8mb4'
+ENV MYSQL_COLLATION='utf8mb4_general_ci'
 ENV MYSQL_USER=''
 ENV MYSQL_PASSWORD=''