diff --git a/.drone.yml b/.drone.yml
index 6cffe26..59b31bf 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -34,7 +34,7 @@ steps:
         from_secret: DEPLOY_SSH_KEY
     commands: # warning! Doesn't seem to like hashed known_hosts...
       - cargo install -q mdbook
-      - apt-get -qq update && apt-get -yqq install rsync
+      - apt-get -qq update && apt-get -yqq install rsync ssh
       - cd docs
       - mdbook build
       - echo "$DEPLOY_SSH_KEY" > /tmp/rsync_key