diff --git a/README.md b/README.md
index b9e39ed..d70c882 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ The following environment variables are available:
 ```
 STEAM_USERNAME (DEFAULT: "" - Required for installing/updating Starbound)
 STEAM_PASSWORD (DEFAULT: "" - Required for installing/updating Starbound)
+SKIP_STEAMCMD  (DEFAULT: "" - Optional for skipping updating Starbound)
 ```
 
 # Updating the server
diff --git a/start_starbound.sh b/start_starbound.sh
index c1bee42..cff8502 100755
--- a/start_starbound.sh
+++ b/start_starbound.sh
@@ -39,8 +39,12 @@ if [ ! -f "/steamcmd/starbound/linux/starbound_server" ]; then
 else
 	# Check that username and password are both set, otherwise skip update
 	if [ -z "$STEAM_USERNAME" ] || [ -z "$STEAM_PASSWORD" ]; then
-		echo "Steam username or password not set, skipping update.."
-		exit 1
+		if [ -z "$SKIP_STEAMCMD" ]; then
+			echo "Steam username or password not set, exiting.."
+			exit 1
+		else
+			echo "Steam username or password not set, skipping update.."
+		fi
 	else
 		# Install Starbound from install.txt
 		echo "Installing Starbound.."