diff --git a/pkg/extensions/extension_userprefs.go b/pkg/extensions/extension_userprefs.go
index 124c95e7..0a9404ec 100644
--- a/pkg/extensions/extension_userprefs.go
+++ b/pkg/extensions/extension_userprefs.go
@@ -49,7 +49,7 @@ func SetupUserPreferencesRoutes(config *config.Config, router *mux.Router, store
 // @Router 	/v2/_zot/ext/userprefs [put]
 // @Accept  json
 // @Produce json
-// @Param 	action	 	 query 	 string 		true	"specify action" Enums("toggleBookmark", "toggleStar")
+// @Param 	action	 	 query 	 string 		true	"specify action" Enums(toggleBookmark, toggleStar)
 // @Param   repo     	 query    string			true	"repository name"
 // @Success 200 {string}	string				"ok"
 // @Failure 404 {string} 	string 				"not found"
diff --git a/swagger/docs.go b/swagger/docs.go
index c1457659..672a42a4 100644
--- a/swagger/docs.go
+++ b/swagger/docs.go
@@ -180,8 +180,8 @@ const docTemplate = `{
                 "parameters": [
                     {
                         "enum": [
-                            "\"toggleBookmark\"",
-                            "\"toggleStar\""
+                            "toggleBookmark",
+                            "toggleStar"
                         ],
                         "type": "string",
                         "description": "specify action",
diff --git a/swagger/swagger.json b/swagger/swagger.json
index 41d3b0b1..c24fa253 100644
--- a/swagger/swagger.json
+++ b/swagger/swagger.json
@@ -171,8 +171,8 @@
                 "parameters": [
                     {
                         "enum": [
-                            "\"toggleBookmark\"",
-                            "\"toggleStar\""
+                            "toggleBookmark",
+                            "toggleStar"
                         ],
                         "type": "string",
                         "description": "specify action",
diff --git a/swagger/swagger.yaml b/swagger/swagger.yaml
index 32e9d4d8..0226e71d 100644
--- a/swagger/swagger.yaml
+++ b/swagger/swagger.yaml
@@ -311,8 +311,8 @@ paths:
       parameters:
       - description: specify action
         enum:
-        - '"toggleBookmark"'
-        - '"toggleStar"'
+        - toggleBookmark
+        - toggleStar
         in: query
         name: action
         required: true