diff --git a/.drone.yml b/.drone.yml
index d55db56..f8611ab 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,6 +6,7 @@ steps:
   - name: build
     image: espressif/idf:release-v4.1
     commands:
+      - git submodule update --init
       - if [ -f sdkconfig ]; then
       -   rm sdkconfig
       - fi