diff --git a/.drone.yml b/.drone.yml
index 6ca2212..1bc7d0a 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -5,6 +5,7 @@ steps:
   - name: check documentation build
     image: rust:1.49-slim-buster
     commands:
+      - apt update
       - apt install git
       - git submodule init
       - git submodule update --recursive --remote