diff --git a/pyproject.toml b/pyproject.toml
index 117e884..facd148 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     # pytest-aiohttp 1.1 requires aiohttp 3.11, and aiohttp ships no cp314 wheel before 3.13.
     "aiohttp>=3.11,<4; python_version < '3.14'",
     "aiohttp>=3.13,<4; python_version >= '3.14'",
-    "modern-di>=3.1.1,<4",
+    "modern-di>=3.1.1,<5",
 ]
 version = "0"