diff --git a/zsh/update.zsh b/zsh/update.zsh
index c69b793..5f1854b 100644
--- a/zsh/update.zsh
+++ b/zsh/update.zsh
@@ -50,7 +50,7 @@ _check_date() {
 
     if [ "$new_date" != "$old_date" ]; then
         _sentence not_updated
-    elif [ "$UPDATE_CHECK_ALWAYS" == "true" ]; then
+    elif [ "$UPDATE_CHECK_ALWAYS" = "true" ]; then
         _sentence updated
     fi
 }