diff --git a/pyproject.toml b/pyproject.toml
index 61b56f2..f0fad50 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ riskmap-api = "ai_risk_manager.api.server:app_entry"
 
 [project.optional-dependencies]
 api = [
-  "fastapi==0.138.1",
+  "fastapi==0.139.0",
   "pydantic==2.13.4",
   "uvicorn==0.49.0",
 ]
@@ -48,7 +48,7 @@ dev = [
   "ruff==0.15.20",
   "mypy==2.1.0",
   "mutmut==3.6.0",
-  "fastapi==0.138.1",
+  "fastapi==0.139.0",
   "httpx==0.28.1",
   "pydantic==2.13.4",
   "uvicorn==0.49.0",