diff --git a/aieng-agents/pyproject.toml b/aieng-agents/pyproject.toml
index 01d599a..288800d 100644
--- a/aieng-agents/pyproject.toml
+++ b/aieng-agents/pyproject.toml
@@ -33,7 +33,7 @@ code-interpreter = [
     "e2b-code-interpreter>=2.6.0",
 ]
 gemini-proxy = [
-    "fastapi[standard]>=0.138.2,<0.139.0",
+    "fastapi[standard]>=0.139.0,<0.140.0",
     "google-cloud-firestore>=2.27.0",
     "google-genai>=1.73.1",
 ]
diff --git a/uv.lock b/uv.lock
index 70c4c41..9929fa4 100644
--- a/uv.lock
+++ b/uv.lock
@@ -181,7 +181,7 @@ requires-dist = [
     { name = "click", marker = "extra == 'data'", specifier = ">=8.3.2" },
     { name = "datasets", marker = "extra == 'data'", specifier = ">=4.8.4" },
     { name = "e2b-code-interpreter", marker = "extra == 'code-interpreter'", specifier = ">=2.6.0" },
-    { name = "fastapi", extras = ["standard"], marker = "extra == 'gemini-proxy'", specifier = ">=0.138.2,<0.139.0" },
+    { name = "fastapi", extras = ["standard"], marker = "extra == 'gemini-proxy'", specifier = ">=0.139.0,<0.140.0" },
     { name = "google-cloud-firestore", marker = "extra == 'gemini-proxy'", specifier = ">=2.27.0" },
     { name = "google-genai", marker = "extra == 'gemini-proxy'", specifier = ">=1.73.1" },
     { name = "gradio", marker = "extra == 'gradio'", specifier = ">=6.12.0" },
@@ -1132,7 +1132,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.138.2"
+version = "0.139.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -1141,9 +1141,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/0c/a9/9f8f7e00195c29836e9bf58bbbaf579e29878b8a67851efff93d9b6d4eb7/fastapi-0.138.2.tar.gz", hash = "sha256:6432359d067a432134620e7c5e4c6e5063e7f37815bbbbf20acef14b0d2e3fc8", size = 420423, upload-time = "2026-06-29T12:44:12.556Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/d3/af/a5f50ccfa659ec1802cb4ca842c23f06d906a8cc9aef6016a2caeea3d4ed/fastapi-0.139.0.tar.gz", hash = "sha256:99ab7b2d92223c76d6cf10757ab3f89d45b38267fc20b2a136cf02f6beac3145", size = 423016, upload-time = "2026-07-01T16:35:33.436Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/f2/b3/38be2c074bdd0c986340db1d72d7b2321b805b1c5a68069aa00b5d31fd02/fastapi-0.138.2-py3-none-any.whl", hash = "sha256:db90c1ffb5517fba5d4a9f80e866daa008747e646310c9ce155c8c535f9d1615", size = 129271, upload-time = "2026-06-29T12:44:13.905Z" },
+    { url = "https://files.pythonhosted.org/packages/9e/7c/8e3c6ad324ea5cb36604fc3f968554887891c316d9dfde57761611d907ad/fastapi-0.139.0-py3-none-any.whl", hash = "sha256:cf15e1e9e667ddb0ad63811e60bd11390d1aac838ca4a7a23f421807b2308189", size = 130339, upload-time = "2026-07-01T16:35:32.19Z" },
 ]
 
 [[package]]