diff --git a/core.lib b/core.lib
index fb1cc2dea9..5ef8487110 100644
--- a/core.lib
+++ b/core.lib
@@ -1 +1 @@
-https://github.com/mbedmicro/mbed/#c2b30300795933f373f51e36d506aeb9429a3b59
+https://github.com/mbedmicro/mbed/#e9b56018d254b97bd18c1f73099b659423dbd08d