diff --git a/sigmf-schema.json b/sigmf-schema.json
index 9167db3..33eb96d 100644
--- a/sigmf-schema.json
+++ b/sigmf-schema.json
@@ -83,7 +83,7 @@
           "description": "Number of interleaved channels in the Dataset file, if omitted this is implied to be 1, for multiple channels of IQ data, it is RECOMMENDED to use SigMF Collections instead of num_channels for widest application support.",
           "default": 1,
           "minimum": 1,
-          "maximum": 1000,
+          "maximum": 9223372036854775807,
           "type": "integer"
         },
         "core:offset": {