diff --git a/build/Dockerfile b/build/Dockerfile
index 262d287d6e..4d577989c1 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -4,7 +4,7 @@ FROM alpine:3.11
 ENV PATH="/mattermost/bin:${PATH}"
 ARG PUID=2000
 ARG PGID=2000
-ARG MM_PACKAGE="https://releases.mattermost.com/5.18.1/mattermost-5.18.1-linux-amd64.tar.gz"
+ARG MM_PACKAGE="https://releases.mattermost.com/5.21.0/mattermost-5.21.0-linux-amd64.tar.gz"
 
 
 # Install some needed packages