diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index e17f6e1b..ec989158 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -111,7 +111,7 @@ dependencies = [
     "slowapi==0.1.9",
     "sniffio==1.3.1",
     "sortedcontainers==2.4.0",
-    "sse-starlette==2.2.1",
+    "sse-starlette==3.2.0",
     "starlette==0.49.1",
     "tiktoken==0.11.0",
     "tomli==2.0.2",
diff --git a/backend/uv.lock b/backend/uv.lock
index e8a9e1c2..917a9fb4 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -1277,7 +1277,7 @@ requires-dist = [
     { name = "slowapi", specifier = "==0.1.9" },
     { name = "sniffio", specifier = "==1.3.1" },
     { name = "sortedcontainers", specifier = "==2.4.0" },
-    { name = "sse-starlette", specifier = "==2.2.1" },
+    { name = "sse-starlette", specifier = "==3.2.0" },
     { name = "starlette", specifier = "==0.49.1" },
     { name = "tiktoken", specifier = "==0.11.0" },
     { name = "tomli", specifier = "==2.0.2" },
@@ -3036,15 +3036,15 @@ wheels = [
 
 [[package]]
 name = "sse-starlette"
-version = "2.2.1"
+version = "3.2.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
     { name = "starlette" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/71/a4/80d2a11af59fe75b48230846989e93979c892d3a20016b42bb44edb9e398/sse_starlette-2.2.1.tar.gz", hash = "sha256:54470d5f19274aeed6b2d473430b08b4b379ea851d953b11d7f1c4a2c118b419", size = 17376, upload-time = "2024-12-25T09:09:30.616Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/8b/8d/00d280c03ffd39aaee0e86ec81e2d3b9253036a0f93f51d10503adef0e65/sse_starlette-3.2.0.tar.gz", hash = "sha256:8127594edfb51abe44eac9c49e59b0b01f1039d0c7461c6fd91d4e03b70da422", size = 27253, upload-time = "2026-01-17T13:11:05.62Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d9/e0/5b8bd393f27f4a62461c5cf2479c75a2cc2ffa330976f9f00f5f6e4f50eb/sse_starlette-2.2.1-py3-none-any.whl", hash = "sha256:6410a3d3ba0c89e7675d4c273a301d64649c03a5ef1ca101f10b47f895fd0e99", size = 10120, upload-time = "2024-12-25T09:09:26.761Z" },
+    { url = "https://files.pythonhosted.org/packages/96/7f/832f015020844a8b8f7a9cbc103dd76ba8e3875004c41e08440ea3a2b41a/sse_starlette-3.2.0-py3-none-any.whl", hash = "sha256:5876954bd51920fc2cd51baee47a080eb88a37b5b784e615abb0b283f801cdbf", size = 12763, upload-time = "2026-01-17T13:11:03.775Z" },
 ]
 
 [[package]]