diff --git a/pkgs/by-name/ca/calendar-cli/package.nix b/pkgs/by-name/ca/calendar-cli/package.nix
index b59dda3354ee..310aa702f60c 100644
--- a/pkgs/by-name/ca/calendar-cli/package.nix
+++ b/pkgs/by-name/ca/calendar-cli/package.nix
@@ -40,6 +40,7 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
     tzlocal
     click
     six
+    urllib3
     vobject
   ];