diff --git a/setup.py b/setup.py
index 347e793..5eb842c 100644
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@ setup(
         "pyyaml",
         "tabulate",
         "jinja2",
+        "weasyprint",
     ],
     license="GPLv3",
     keywords="cable connector hardware harness wiring wiring-diagram wiring-harness",