diff --git a/pyproject.toml b/pyproject.toml
index bc1bfd48..df069ec7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 requires-python = ">=3.11"
 dependencies = [
     "click<9",
-    "cryptography<42",
+    "cryptography<43",
     "fastapi<1",
     "gidgethub<6",
     "httpx>=0.20.0,<1",