diff --git a/shell/thanks.sh b/shell/thanks.sh
index 84e0956..8afde74 100644
--- a/shell/thanks.sh
+++ b/shell/thanks.sh
@@ -2,6 +2,6 @@
 
 composer global thanks
 
-if [ -f "./composer.json" ]; then
+if [[ -f "./composer.json" ]]; then
     composer thanks
 fi