diff --git a/pyproject.toml b/pyproject.toml
index 2aae610..f85bcc1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,8 +23,8 @@ classifiers = [
 description = "CLI to convert yaml into ics."
 
 dependencies = [
-    "ics-vtimezones == 2020.2",
-    "ics == 0.8.0.dev0",
+    "ics-vtimezones == 2026.1",
+    "ics == 0.8.0.dev1",
     "python-dateutil >= 2.8",
     "pyyaml >= 6",
     "importlib-resources >= 5.2.1",