diff --git a/download.json.schema b/download.json.schema
index 9c976e0..b762fd0 100644
--- a/download.json.schema
+++ b/download.json.schema
@@ -18,7 +18,8 @@
                 "sh": {
                     "$ref": "#/definitions/file"
                 }
-            }
+            },
+            "required": ["version", "jar", "exe"]
         }
     },
     "additionalProperties": false,