diff --git a/pkgs/development/python-modules/mkdocs-build-plantuml/default.nix b/pkgs/development/python-modules/mkdocs-build-plantuml/default.nix
index be7a03fa53ad..22d6ccb201f5 100644
--- a/pkgs/development/python-modules/mkdocs-build-plantuml/default.nix
+++ b/pkgs/development/python-modules/mkdocs-build-plantuml/default.nix
@@ -5,6 +5,7 @@
   pkgs, # Only for pkgs.plantuml,
   setuptools,
   httplib2,
+  mkdocs,
 }:
 
 buildPythonPackage rec {
@@ -29,6 +30,7 @@ buildPythonPackage rec {
 
   dependencies = [
     httplib2
+    mkdocs
   ];
 
   pythonImportsCheck = [ "mkdocs_build_plantuml_plugin" ];