diff --git a/source/examples/bluetooth-eddystone-uid/config.json b/source/examples/bluetooth-eddystone-uid/config.json
index 697b3ae..989a0da 100755
--- a/source/examples/bluetooth-eddystone-uid/config.json
+++ b/source/examples/bluetooth-eddystone-uid/config.json
@@ -12,7 +12,8 @@
             "event_service": 0,
             "device_info_service": 0,
             "eddystone_url": 0,
-            "eddystone_uid": 1
+            "eddystone_uid": 1,
+            "security_level": "SECURITY_MODE_ENCRYPTION_NO_MITM"
         },
         "gatt_table_size": "0x600"
     }
diff --git a/source/examples/bluetooth-eddystone-url/config.json b/source/examples/bluetooth-eddystone-url/config.json
index 94cc404..1c2afba 100755
--- a/source/examples/bluetooth-eddystone-url/config.json
+++ b/source/examples/bluetooth-eddystone-url/config.json
@@ -12,7 +12,8 @@
             "event_service": 0,
             "device_info_service": 0,
             "eddystone_url": 1,
-            "eddystone_uid": 0
+            "eddystone_uid": 0,
+            "security_level": "SECURITY_MODE_ENCRYPTION_NO_MITM"
         },
         "gatt_table_size": "0x600"
     }
diff --git a/source/examples/bluetooth-services/config.json b/source/examples/bluetooth-services/config.json
index f0502e0..a88e82e 100755
--- a/source/examples/bluetooth-services/config.json
+++ b/source/examples/bluetooth-services/config.json
@@ -10,7 +10,8 @@
             "tx_power": 0,
             "dfu_service": 0,
             "event_service": 0,
-            "device_info_service": 1
+            "device_info_service": 1,
+            "security_level": "SECURITY_MODE_ENCRYPTION_NO_MITM"
         },
         "gatt_table_size": "0x700"
     }
diff --git a/source/examples/bluetooth-uart/config.json b/source/examples/bluetooth-uart/config.json
index 1be7a42..fd13b74 100755
--- a/source/examples/bluetooth-uart/config.json
+++ b/source/examples/bluetooth-uart/config.json
@@ -10,7 +10,8 @@
             "tx_power": 0,
             "dfu_service": 1,
             "event_service": 0,
-            "device_info_service": 1
+            "device_info_service": 1,
+            "security_level": "SECURITY_MODE_ENCRYPTION_NO_MITM"
         },
         "gatt_table_size": "0x600"
     }