diff --git a/pyproject.toml b/pyproject.toml
index 78c1b9c4..82a7b0b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
     "tomli<3.0.0,>=2.2.1",
     "django-honeypot<2.0.0,>=1.2.1",
     "pydantic-extra-types<3.0.0,>=2.10.2",
-    "ical<9.0.0,>=8.3.1",
+    "ical>=8.3.1,<10.0.0",
     "redis[hiredis]<6.0.0,>=5.2.0",
     "environs[django]<15.0.0,>=14.1.0",
     "requests>=2.32.3",