diff --git a/.drone.yml b/.drone.yml
index cd1d3a6..1f8cf9a 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,6 +3,10 @@ type: docker
 name: default
 
 steps:
+  - name: submodules
+    image: alpine:git
+    commands:
+    - git submodule update --recursive --remote
   - name: build left, debug
     image: hardwario/gcc-arm-embedded:7-2017-q4-major
     commands: