diff --git a/internal/db/models.go b/internal/db/models.go
index 5d8c6fe..973198d 100644
--- a/internal/db/models.go
+++ b/internal/db/models.go
@@ -4,8 +4,6 @@
 
 package db
 
-import ()
-
 type Url struct {
 	ID      int32
 	Hash    string
diff --git a/openapi.yaml b/openapi.yaml
index 1b9135c..505fbe3 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -4,17 +4,17 @@ info:
   version: 0.1.0
   description: An URL shortener service.
 paths:
-  '/{hash}':
+  "/{hash}":
     get:
       responses:
-        '307':
+        "307":
           description: Redirect client to long URL.
           headers:
             Location:
               schema:
                 type: string
               description: Long URL
-        '404':
+        "404":
           description: Not Found
       description: Redirect client to long URL.
       operationId: redirectLongURL
@@ -38,11 +38,11 @@ paths:
                 url:
                   type: string
                   description: URL to shorten
-                  example: 'https://example.com'
+                  example: "https://example.com"
               required:
                 - url
       responses:
-        '201':
+        "201":
           description: Succesfully created shorten URL.
           content:
             application/json:
@@ -54,7 +54,7 @@ paths:
                     description: Created shorten URL. Going to this URL should redirect to URL from request body.
                 required:
                   - shorten
-        '400':
+        "400":
           description: Bad Request
           content:
             application/json: