diff --git a/example/bookstore/v1/bookstore_openapi.json b/example/bookstore/v1/bookstore_openapi.json
index 3844347..6f5d8f5 100644
--- a/example/bookstore/v1/bookstore_openapi.json
+++ b/example/bookstore/v1/bookstore_openapi.json
@@ -15,7 +15,7 @@
       "get": {
         "summary": "",
         "description": "List method for isbn",
-        "operationId": "isbn.list",
+        "operationId": "ListIsbn",
         "parameters": [
           {
             "name": "max_page_size",
@@ -91,7 +91,7 @@
       "get": {
         "summary": "",
         "description": "Get method for isbn",
-        "operationId": "isbn.get",
+        "operationId": "GetIsbn",
         "parameters": [
           {
             "name": "isbn",
diff --git a/example/bookstore/v1/bookstore_openapi.yaml b/example/bookstore/v1/bookstore_openapi.yaml
index b8979f0..9a762fc 100644
--- a/example/bookstore/v1/bookstore_openapi.yaml
+++ b/example/bookstore/v1/bookstore_openapi.yaml
@@ -106,7 +106,7 @@ paths:
   /isbns:
     get:
       description: List method for isbn
-      operationId: isbn.list
+      operationId: ListIsbn
       parameters:
       - description: ""
         in: query
@@ -155,7 +155,7 @@ paths:
   /isbns/{isbn}:
     get:
       description: Get method for isbn
-      operationId: isbn.get
+      operationId: GetIsbn
       parameters:
       - description: ""
         in: path