diff --git a/shell.nix b/shell.nix
index 834cea1..57a9006 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,5 +8,6 @@
                     pkgs.perlPackages.URI
                     pkgs.minify
                     pkgs.haskellPackages.sws
+                    pkgs.cacert
                   ];
   }