diff --git a/README.md b/README.md
index 6e98fcd..9c6dff9 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ Use the `downloadMods.sh` to download mods to a volume.
 
 # Environment variables
 
+`PORT` - Port to listen on. default: 2302
+`LIMIT_FPS` - Limit the fps of the server
 `STEAM_USER` - Steam username
 `STEAM_PASSWORD` - Steam password
 `WORKSHOP_COLLECTION` - id of a steam workshop collection. Used to load mods
diff --git a/entrypoint.sh b/entrypoint.sh
index d680583..d69b29a 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -34,12 +34,12 @@ fi
 # https://community.bistudio.com/wiki/Arma_3:_Startup_Parameters#Server_Options
 SERVER_ARGS="-name server -config=$VOLUME_HOME/config/config.cfg -profiles=$VOLUME_HOME/config/profiles"
 
-if [ -n "$A3_LIMIT_FPS" ]; then
-    SERVER_ARGS="${SERVER_ARGS} -limitFPS=${A3_LIMIT_FPS}"
+if [ -n "$LIMIT_FPS" ]; then
+    SERVER_ARGS="${SERVER_ARGS} -limitFPS=${LIMIT_FPS}"
 fi
 
-if [ -n "$A3_PORT" ]; then
-    SERVER_ARGS="${SERVER_ARGS} -port=${A3_PORT}"
+if [ -n "$PORT" ]; then
+    SERVER_ARGS="${SERVER_ARGS} -port=${PORT}"
 fi
 
 #