diff --git a/README.md b/README.md
index cd86da9..664d78c 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ posthtml([
 ### `tags`
 
 Type: `Array`\
-Default: `[a]`
+Default: `['a']`
 
 Array of tag names to process.