diff --git a/arty.yml b/arty.yml
index 763d2d5a..845fdc8d 100644
--- a/arty.yml
+++ b/arty.yml
@@ -29,7 +29,7 @@ references:
 scripts:
   debian/install:
     sudo apt install curl zsh fzf davfs2 krusader make imagemagick ffmpeg yt-dlp
-    thunderbird
+    thunderbird pkg-config libssl-dev
   rust/install: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
   node/install: nvm install
   ruby/install: rbenv install