diff --git a/pyproject.toml b/pyproject.toml
index 941c118e60..27909fa3d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ dev = [
 
 toxgen = [
     "jinja2",
-    "packaging<26.0",
+    "packaging<27.0",
     "pip",
     "requests",
 ]