diff --git a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2021-10-01-preview/inputs.json b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2021-10-01-preview/inputs.json
index 4a246448c8da..46d902f7ad79 100644
--- a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2021-10-01-preview/inputs.json
+++ b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2021-10-01-preview/inputs.json
@@ -727,7 +727,7 @@
         "sourcePartitionCount": {
           "type": "integer",
           "format": "int32",
-          "description": "The partition count of the blob input data source. Range 1 - 256."
+          "description": "The partition count of the blob input data source. Range 1 - 1024."
         },
         "fullSnapshotRefreshRate": {
           "type": "string",
diff --git a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2022-03-01-preview/inputs.json b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2022-03-01-preview/inputs.json
index 31063a344a8d..716c3bba58a2 100644
--- a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2022-03-01-preview/inputs.json
+++ b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2022-03-01-preview/inputs.json
@@ -557,7 +557,7 @@
         "sourcePartitionCount": {
           "type": "integer",
           "format": "int32",
-          "description": "The partition count of the blob input data source. Range 1 - 256."
+          "description": "The partition count of the blob input data source. Range 1 - 1024."
         }
       }
     },
@@ -727,7 +727,7 @@
         "sourcePartitionCount": {
           "type": "integer",
           "format": "int32",
-          "description": "The partition count of the blob input data source. Range 1 - 256."
+          "description": "The partition count of the blob input data source. Range 1 - 1024."
         },
         "fullSnapshotRefreshRate": {
           "type": "string",