diff --git a/tox.ini b/tox.ini
index c958f8f..08041a1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,7 +34,7 @@ commands =
 # the type_check environment checks the type hints using mypy
 deps =
     -r requirements.txt
-    holidays<0.34   # temporarly pinned because PR #55
+    holidays
     mypy
     types-pytz
     types-python-dateutil