diff --git a/shell.nix b/shell.nix
index 74f3af0..4fd6f4a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,7 +8,7 @@ let
 in mkShell {
   nativeBuildInputs = [
     ruby gems bundler libxml2 nodejs yarn cacert git glibcLocales
-    pandoc (texlive.combine { inherit (texlive) scheme-basic xetex unicode-math enumitem booktabs; })
+    pandoc (texlive.combine { inherit (texlive) scheme-basic xetex unicode-math enumitem booktabs ulem; })
   ] ++ (if stdenv.isDarwin then [terminal-notifier] else []);
   shellHook = ''
     export LANG=en_US.UTF-8