diff --git a/.drone.yml b/.drone.yml
index d4a8da3..c5a5dff 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -4,6 +4,11 @@ type: docker
 name: Build
 
 steps:
+  - name: Submodules
+    image: alpine/git
+    commands:
+      - git submodule update --init --recursive
+
   - name: Build
     image: "git.minori.work/embedded_sdk/embedded-builder-arm:12.2.mpacbti-rel1"
     commands: