diff --git a/libs/bluetooth/pxt.json b/libs/bluetooth/pxt.json
index dd8e2e56..cc0f8575 100644
--- a/libs/bluetooth/pxt.json
+++ b/libs/bluetooth/pxt.json
@@ -20,6 +20,12 @@
                     "enabled": 1
                 }
             }
+        },
+        "optionalConfig": {
+            "microbit-dal": {
+                "stack_size": 1280,
+                "gatt_table_size": "0x700"
+            }
         }
     },
     "installedVersion": "vzlhfd"
diff --git a/libs/core/pxt.json b/libs/core/pxt.json
index 3a948a55..3442c575 100644
--- a/libs/core/pxt.json
+++ b/libs/core/pxt.json
@@ -59,7 +59,6 @@
                     "pairing_mode": 1,
                     "whitelist": 1,
                     "security_level": "SECURITY_MODE_ENCRYPTION_NO_MITM",
-                    "gatt_table_size": "0x700",
                     "partial_flashing": 1
                 }
             }
diff --git a/pxtarget.json b/pxtarget.json
index 1344a131..216c8b9c 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -215,7 +215,7 @@
         "yottaTarget": "bbc-microbit-classic-gcc",
         "yottaCorePackage": "microbit",
         "githubCorePackage": "lancaster-university/microbit",
-        "gittag": "dal-integration-5",
+        "gittag": "dal-integration-6",
         "serviceId": "microbit",
         "dockerImage": "pext/yotta:latest"
     },