diff --git a/packaging/litellm-core/pyproject.toml b/packaging/litellm-core/pyproject.toml
index db50589a675..1141e69c0aa 100644
--- a/packaging/litellm-core/pyproject.toml
+++ b/packaging/litellm-core/pyproject.toml
@@ -11,7 +11,7 @@ authors = [
 ]
 dependencies = [
     "fastuuid>=0.14.0,<1.0; python_version < '3.15'",
-    "filelock>=3.16.1,<4.0",
+    "filelock>=3.16.1,<5",
     "httpx[http2]>=0.28.0,<1.0",
     "openai>=2.20.0,<4.0.0",
     "python-dateutil>=2.8.2,<3.0",
diff --git a/pyproject.toml b/pyproject.toml
index bff00a2dbf1..de1abeddd7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
     # When changing a floor, verify it installs + imports on every supported
     # Python with: `uv pip install --resolution=lowest-direct .`
     "fastuuid>=0.14.0,<1.0; python_version < '3.15'",
-    "filelock>=3.16.1,<4.0",
+    "filelock>=3.16.1,<5",
     "httpx[http2]>=0.28.0,<1.0",
     "openai>=2.20.0,<4.0.0",
     "python-dotenv>=1.0.0,<2.0",
diff --git a/uv.lock b/uv.lock
index f36fd3495a9..2ba97d15327 100644
--- a/uv.lock
+++ b/uv.lock
@@ -5242,7 +5242,7 @@ requires-dist = [
     { name = "fastapi", marker = "extra == 'proxy'", specifier = ">=0.136.3,<1.0" },
     { name = "fastapi-sso", marker = "extra == 'proxy'", specifier = ">=0.19.0,<1.0" },
     { name = "fastuuid", marker = "python_full_version < '3.15'", specifier = ">=0.14.0,<1.0" },
-    { name = "filelock", specifier = ">=3.16.1,<4.0" },
+    { name = "filelock", specifier = ">=3.16.1,<5" },
     { name = "google-cloud-aiplatform", marker = "extra == 'google'", specifier = ">=1.133.0,<2.0" },
     { name = "google-cloud-aiplatform", marker = "extra == 'proxy-runtime'", specifier = ">=1.133.0,<2.0" },
     { name = "google-cloud-iam", marker = "extra == 'extra-proxy'", specifier = ">=2.19.1,<3.0" },