diff --git a/README.md b/README.md
index f558f22..24e4376 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ Flags:
         transform each item name by adding a prefix. Default: ""
   -comment value
         comments to include in generated code, can repeat. Default: ""
+  -gqlgen
+        if true, GraphQL marshaling methods for gqlgen will be generated. Default: false
   -json
         if true, json marshaling methods will be generated. Default: false
   -linecomment