diff --git a/pyproject.toml b/pyproject.toml
index dd04fbcc..52938d0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
     "tomli<3.0.0,>=2.2.1",
     "django-honeypot",
     "pydantic-extra-types<3.0.0,>=2.10.3",
-    "ical<10.0.0,>=9.1.0",
+    "ical>=9.1.0,<11.0.0",
     "redis[hiredis]<6.0.0,>=5.3.0",
     "environs[django]<15.0.0,>=14.1.1",
     "requests>=2.32.3",