diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index afd24c5..22f3d00 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -25,7 +25,7 @@ RUN chmod +x /ftemp/Install_Script.sh \
 VOLUME /foundry
 
 # TCP Port
-EXPOSE 30000
+EXPOSE ${GAME_PORT}
 
 # Run command
 CMD [ "/bin/sh", "/ftemp/Install_Script.sh" ]