diff --git a/pyproject.toml b/pyproject.toml
index 5eb6947e..283160f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ calendar = [
     "google-api-python-client>=2.0",
     "google-auth>=2.0",
     "google-auth-oauthlib>=1.0",
-    "google-auth-httplib2>=0.2",
+    "google-auth-httplib2>=0.4.0",
     "caldav>=1.3",
     "icalendar>=5.0",
     "cryptography>=41.0",