diff --git a/pyproject.toml b/pyproject.toml
index d0d0f83c..c2eb7238 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
     "tomli>=2.3.0,<3.0.0",
     "django-honeypot>=1.3.0,<2",
     "pydantic-extra-types>=2.10.6,<3.0.0",
-    "ical>=11.1.0,<12",
+    "ical>=11.1.0,<13",
     "redis[hiredis]<7,>=5.3.0",
     "environs[django]>=14.5.0,<15.0.0",
     "requests>=2.32.5,<3.0.0",