diff --git a/tester/v1/openapi.yaml b/tester/v1/openapi.yaml
index ea5bca3..60d1757 100644
--- a/tester/v1/openapi.yaml
+++ b/tester/v1/openapi.yaml
@@ -183,7 +183,7 @@ paths:
       responses:
         "200":
           description: OK
-  /contests/tasks:
+  /tasks:
     post:
       operationId: AddTask
       security:
@@ -222,7 +222,7 @@ paths:
       responses:
         "200":
           description: OK
-  /contests/participants:
+  /participants:
     get:
       operationId: ListParticipants
       security:
@@ -311,6 +311,110 @@ paths:
       responses:
         "200":
           description: OK
+  /solutions:
+    post:
+      operationId: CreateSolution
+      security:
+        - bearerAuth: [ ]
+      parameters:
+        - name: task_id
+          in: query
+          required: true
+          schema:
+            type: integer
+            format: int32
+        - name: language
+          in: query
+          required: true
+          schema:
+            type: integer
+            format: int32
+      requestBody:
+        required: true
+        content:
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/CreateSolutionRequest'
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/CreateSolutionResponse'
+    get:
+      operationId: ListSolutions
+      security:
+        - bearerAuth: [ ]
+      parameters:
+        - name: page
+          in: query
+          required: true
+          schema:
+            type: integer
+            format: int32
+        - name: pageSize
+          in: query
+          required: true
+          schema:
+            type: integer
+            format: int32
+        - name: contest_id
+          in: query
+          schema:
+            type: integer
+            format: int32
+        - name: participantId
+          in: query
+          schema:
+            type: integer
+            format: int32
+        - name: task_id
+          in: query
+          schema:
+            type: integer
+            format: int32
+        - name: state
+          in: query
+          schema:
+            type: integer
+            format: int32
+        - name: order
+          in: query
+          schema:
+            type: integer
+            format: int32
+        - name: language
+          in: query
+          schema:
+            type: integer
+            format: int32
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ListSolutionsResponse'
+  /solutions/{id}:
+    get:
+      operationId: GetSolution
+      security:
+        - bearerAuth: [ ]
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: integer
+            format: int32
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/GetSolutionResponse'
 components:
   schemas:
     Problem:
@@ -684,6 +788,141 @@ components:
       properties:
         name:
           type: string
+    CreateSolutionRequest:
+      type: object
+      required:
+        - solution
+      properties:
+        solution:
+          type: string
+          format: binary
+    CreateSolutionResponse:
+      type: object
+      required:
+        - id
+      properties:
+        id:
+          type: integer
+          format: int32
+    ListSolutionsResponse:
+      type: object
+      required:
+        - solutions
+        - page
+        - max_page
+      properties:
+        solutions:
+          type: array
+          items:
+            $ref: '#/components/schemas/SolutionListItem'
+        page:
+          type: integer
+          format: int32
+        max_page:
+          type: integer
+          format: int32
+    SolutionListItem:
+      type: object
+      required:
+        - id
+        - task_id
+        - contest_id
+        - participant_id
+        - state
+        - score
+        - penalty
+        - total_score
+        - language
+        - updated_at
+        - created_at
+      properties:
+        id:
+          type: integer
+          format: int32
+        task_id:
+          type: integer
+          format: int32
+        contest_id:
+          type: integer
+          format: int32
+        participant_id:
+          type: integer
+          format: int32
+        state:
+          type: integer
+          format: int32
+        score:
+          type: integer
+          format: int32
+        penalty:
+          type: integer
+          format: int32
+        total_score:
+          type: integer
+          format: int32
+        language:
+          type: integer
+          format: int32
+        updated_at:
+          type: string
+          format: date-time
+        created_at:
+          type: string
+          format: date-time
+    Solution:
+      type: object
+      required:
+        - id
+        - task_id
+        - participant_id
+        - state
+        - score
+        - penalty
+        - total_score
+        - solution
+        - language
+        - updated_at
+        - created_at
+      properties:
+        id:
+          type: integer
+          format: int32
+        task_id:
+          type: integer
+          format: int32
+        participant_id:
+          type: integer
+          format: int32
+        state:
+          type: integer
+          format: int32
+        score:
+          type: integer
+          format: int32
+        penalty:
+          type: integer
+          format: int32
+        total_score:
+          type: integer
+          format: int32
+        language:
+          type: integer
+          format: int32
+        solution:
+          type: string
+        updated_at:
+          type: string
+          format: date-time
+        created_at:
+          type: string
+          format: date-time
+    GetSolutionResponse:
+      type: object
+      required:
+        - solution
+      properties:
+        solution:
+          $ref: '#/components/schemas/Solution'
   securitySchemes:
     bearerAuth:
       type: http