diff --git a/api/v1/swagger/swagger.yaml b/api/v1/swagger/swagger.yaml
index 0af9371cf8..607e4c2d2b 100644
--- a/api/v1/swagger/swagger.yaml
+++ b/api/v1/swagger/swagger.yaml
@@ -1,5 +1,5 @@
 ---
-swagger: 2.0
+swagger: "2.0"
 basePath: /api/v1
 definitions:
   account_line:
@@ -403,7 +403,7 @@ parameters:
     type: integer
 info:
   title: Koha REST API
-  version: 1
+  version: "1"
   license:
     name: "GPL v3,"
     url: http://www.gnu.org/licenses/gpl.txt