diff --git a/core/Dockerfile b/core/Dockerfile
index d40e72b..a02a7f3 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -22,4 +22,6 @@ EXPOSE 8001
 
 ENTRYPOINT ["/opt/run.sh"]
 
+ENV MAILMAN_CONFIG_FILE /config/mailman.cfg
+
 CMD ["/usr/local/bin/master"]
diff --git a/core/assets/run.sh b/core/assets/run.sh
index f8034dc..b89194f 100755
--- a/core/assets/run.sh
+++ b/core/assets/run.sh
@@ -122,6 +122,4 @@ base_url: $HYPERKITTY_URL
 api_key: $HYPERKITTY_API_KEY
 EOF
 
-export MAILMAN_CONFIG_FILE=/config/mailman.cfg
-
 exec "$@"