diff --git a/.env b/.env
index 9ec5add..f1074ae 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,3 @@
 export ZEPHYR_SDK_VERSION="0.16.1"
-export ZEPHYR_VERSION="1dc6279d12ea81041c21c8e76d6eae6a2e17bba0"
+export ZEPHYR_VERSION="5efa5b28926097becd6aa4f7ab42a2966f6c2a1e"
 export MICROPYTHON_VERSION="fe2a8332ff9c7cc7b66ed6da04f5a4a825309818"