diff --git a/schema.json b/schema.json
index ecc5cd3..2e53039 100644
--- a/schema.json
+++ b/schema.json
@@ -182,8 +182,8 @@
         },
         "value": {
           "type": "integer",
-          "maximum": 4294967295,
-          "minimum": 0
+          "maximum": 18446744073709551615,
+          "minimum": -9223372036854775808
         }
       },
       "required": ["label", "value"]
@@ -196,10 +196,14 @@
       "type": "object",
       "properties": {
         "lower": {
-          "type": "integer"
+          "type": "integer",
+          "maximum": 18446744073709551615,
+          "minimum": -9223372036854775808
         },
         "upper": {
-          "type": "integer"
+          "type": "integer",
+          "maximum": 18446744073709551615,
+          "minimum": -9223372036854775808
         }
       },
       "required": ["lower", "upper"]