diff --git a/demo/pyproject.toml b/demo/pyproject.toml
index 7a86bbc..5277502 100644
--- a/demo/pyproject.toml
+++ b/demo/pyproject.toml
@@ -3,7 +3,7 @@ name = "demo"
 version = "0.1.0"
 requires-python = ">=3.14"
 dependencies = [
-    "fastapi==0.139.0",
+    "fastapi==0.140.13",
     "uvicorn==0.50.0",
     "opentelemetry-distro==0.64b0",
     "opentelemetry-exporter-otlp==1.43.0",