diff --git a/.drone.yml b/.drone.yml
index fed3b5f..4260725 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -11,7 +11,7 @@ steps:
         path: /_cache
     commands:
       - pwd
-      - apt-get update && apt-get install -y cmake g++ libevent-dev
+      - apt-get update && apt-get install -y cmake g++ libevent-dev libpcre3-dev libyaml-dev
       - shards install
       - shards build --production --static
       - strip bin/docmachine