diff --git a/docs/sources/git-diff-source.md b/docs/sources/git-diff-source.md
index 907edba..7abef7b 100644
--- a/docs/sources/git-diff-source.md
+++ b/docs/sources/git-diff-source.md
@@ -16,7 +16,7 @@ documents:
           - vendor
         path: src
         contains: class
-        notContains: @deprecated
+        notContains: "@deprecated"
         render:
           strategy: llm
           showStats: true
@@ -188,4 +188,4 @@ documents:
         repository: .
         commit: date:2023-01-15
         filePattern: "*.php"
-```
\ No newline at end of file
+```