diff --git a/kas/schema-kas.json b/kas/schema-kas.json
index 77072e7..a3502ea 100644
--- a/kas/schema-kas.json
+++ b/kas/schema-kas.json
@@ -1,5 +1,5 @@
 {
-    "$schema": "https://json-schema.org/draft-04/schema",
+    "$schema": "http://json-schema.org/draft-04/schema#",
     "$id": "https://github.com/siemens/kas/blob/master/kas/schema-kas.json",
     "title": "kas configuration",
     "description": "kas, a setup tool for bitbake based projects",