diff --git a/BLE_BatteryLevel/mbed-os.lib b/BLE_BatteryLevel/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_BatteryLevel/mbed-os.lib
+++ b/BLE_BatteryLevel/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_Beacon/mbed-os.lib b/BLE_Beacon/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_Beacon/mbed-os.lib
+++ b/BLE_Beacon/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_Button/mbed-os.lib b/BLE_Button/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_Button/mbed-os.lib
+++ b/BLE_Button/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_GAPButton/mbed-os.lib b/BLE_GAPButton/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_GAPButton/mbed-os.lib
+++ b/BLE_GAPButton/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_HeartRate/mbed-os.lib b/BLE_HeartRate/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_HeartRate/mbed-os.lib
+++ b/BLE_HeartRate/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_LED/mbed-os.lib b/BLE_LED/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_LED/mbed-os.lib
+++ b/BLE_LED/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_LEDBlinker/mbed-os.lib b/BLE_LEDBlinker/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_LEDBlinker/mbed-os.lib
+++ b/BLE_LEDBlinker/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
diff --git a/BLE_Thermometer/mbed-os.lib b/BLE_Thermometer/mbed-os.lib
index 4beec6c6..ef2aac43 100644
--- a/BLE_Thermometer/mbed-os.lib
+++ b/BLE_Thermometer/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#addec7ba10054be03849eff58a1d17f157391e7d
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360