diff --git a/entrypoint.sh b/entrypoint.sh
index fa4df6c..c06ab9e 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -9,7 +9,7 @@ if ! grep -q "HOME_USER=" /etc/environment; then
   sudo bash -c "echo HOME_USER=$HOME_USER >> /etc/environment"
 fi
 
-if [[ -n "${VSCODE_TUNNEL_NAME}" ]]; then
+if [[ -v VSCODE_TUNNEL_NAME && -n "${VSCODE_TUNNEL_NAME}" ]]; then
   if ! grep -q "VSCODE_TUNNEL_NAME=" /etc/environment; then
     sudo bash -c "echo VSCODE_TUNNEL_NAME=$VSCODE_TUNNEL_NAME >> /etc/environment"
   fi
diff --git a/version.txt b/version.txt
index d9c62ed..282895a 100755
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.0.2
\ No newline at end of file
+3.0.3
\ No newline at end of file