diff --git a/tester/v1/openapi.yaml b/tester/v1/openapi.yaml
index 1e41306..b87547b 100644
--- a/tester/v1/openapi.yaml
+++ b/tester/v1/openapi.yaml
@@ -578,6 +578,7 @@ components:
         - time_limit
         - created_at
         - updated_at
+        - solved_count
       properties:
         id:
           type: integer
@@ -596,6 +597,9 @@ components:
         updated_at:
           type: string
           format: date-time
+        solved_count:
+          type: integer
+          format: int32
     ListProblemsResponse:
       type: object
       required: