diff --git a/_examples/openapi.gen.yaml b/_examples/openapi.gen.yaml
index 430ae6d..7709156 100644
--- a/_examples/openapi.gen.yaml
+++ b/_examples/openapi.gen.yaml
@@ -501,6 +501,7 @@ components:
 paths:
   /rpc/ExampleService/Ping:
     post:
+      operationId: ExampleService-Ping
       tags: ["ExampleService"]
       summary: "Deprecated."
       deprecated: true
@@ -542,6 +543,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/GetUser:
     post:
+      operationId: ExampleService-GetUser
       tags: ["ExampleService"]
       summary: "Deprecated: Use GetUserV2 instead."
       deprecated: true
@@ -585,6 +587,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/GetUserV2:
     post:
+      operationId: ExampleService-GetUserV2
       tags: ["ExampleService"]
       summary: "GetUserV2 returns user based on given userID."
       security:
@@ -629,6 +632,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/FindUser:
     post:
+      operationId: ExampleService-FindUser
       tags: ["ExampleService"]
       summary: "FindUser searches for a user using the given search filter."
       security:
@@ -676,6 +680,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/ListUsers:
     post:
+      operationId: ExampleService-ListUsers
       tags: ["ExampleService"]
       summary: "ListUsers returns all users."
       security:
@@ -718,6 +723,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/GetComplex:
     post:
+      operationId: ExampleService-GetComplex
       tags: ["ExampleService"]
       summary: ""
       requestBody:
@@ -758,6 +764,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/ExampleService/GetAllOptional:
     post:
+      operationId: ExampleService-GetAllOptional
       tags: ["ExampleService"]
       summary: ""
       requestBody:
@@ -798,6 +805,7 @@ paths:
                 - $ref: '#/components/schemas/ErrorDatabaseDown'
   /rpc/AdminService/ListUsers:
     post:
+      operationId: AdminService-ListUsers
       tags: ["AdminService"]
       summary: ""
       security:
diff --git a/main.go.tmpl b/main.go.tmpl
index 7aa1939..627199d 100644
--- a/main.go.tmpl
+++ b/main.go.tmpl
@@ -134,6 +134,7 @@ paths:
   {{- $deprecated := index $method.Annotations "deprecated" }}
   /rpc/{{$service.Name}}/{{$method.Name}}:
     post:
+      operationId: {{$service.Name}}-{{$method.Name}}
       tags: ["{{$service.Name}}"]
       summary: {{ if $deprecated }}{{ if $deprecated.Value }}{{printf "%q" (print "Deprecated: " $deprecated.Value)}}{{else}}"Deprecated."{{end}}{{else if gt (len $method.Comments) 0}}{{printf "%q" (index $method.Comments 0)}}{{else}}""{{end}}
       {{- if $deprecated }}