diff --git a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2017-04-01-preview/inputs.json b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2017-04-01-preview/inputs.json
index 57d29cee39fc..d40cccdc9258 100644
--- a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2017-04-01-preview/inputs.json
+++ b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/preview/2017-04-01-preview/inputs.json
@@ -546,7 +546,7 @@
         "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."
         }
       }
     },
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 dbb5b7fbe3f4..4f6cf61c66b4 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
@@ -547,7 +547,7 @@
         "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."
         }
       }
     },
diff --git a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2016-03-01/inputs.json b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2016-03-01/inputs.json
index 37e57bafa6b5..05cc59f0d757 100644
--- a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2016-03-01/inputs.json
+++ b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2016-03-01/inputs.json
@@ -532,7 +532,7 @@
         "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."
         }
       }
     },
diff --git a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2020-03-01/inputs.json b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2020-03-01/inputs.json
index 1108a23aec64..0588368d5806 100644
--- a/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2020-03-01/inputs.json
+++ b/specification/streamanalytics/resource-manager/Microsoft.StreamAnalytics/stable/2020-03-01/inputs.json
@@ -547,7 +547,7 @@
         "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."
         }
       }
     },