diff --git a/tools/arm_pack_manager/index.json b/tools/arm_pack_manager/index.json
index 456431543c..c018b7c665 100644
--- a/tools/arm_pack_manager/index.json
+++ b/tools/arm_pack_manager/index.json
@@ -462678,7 +462678,7 @@
               "non_secure_callable": false
             },
             "start": 134217728,
-            "size": 16777216,
+            "size": 1048576,
             "startup": true,
             "default": true
           },
@@ -462702,7 +462702,7 @@
           {
             "file_name": "CMSIS/Flash/STM32WB_M4.FLM",
             "start": 134217728,
-            "size": 16777216,
+            "size": 1048576,
             "default": true,
             "ram_start": null,
             "ram_size": null