diff --git a/pyproject.toml b/pyproject.toml
index 4e7e9d7..efde945 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "mcp"
-version = "1.1.1.dev0"
+version = "1.1.2.dev0"
 description = "Model Context Protocol SDK"
 readme = "README.md"
 requires-python = ">=3.10"
@@ -31,7 +31,7 @@ dependencies = [
     "httpx-sse>=0.4",
     "pydantic>=2.7.2",
     "starlette>=0.27",
-    "sse-starlette>=2.0",
+    "sse-starlette>=1.6.1",
 ]
 
 [project.urls]
diff --git a/uv.lock b/uv.lock
index cad68eb..db4dbc7 100644
--- a/uv.lock
+++ b/uv.lock
@@ -170,7 +170,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.1.1.dev0"
+version = "1.1.2.dev0"
 source = { editable = "." }
 dependencies = [
     { name = "anyio" },
@@ -195,7 +195,7 @@ requires-dist = [
     { name = "httpx", specifier = ">=0.27" },
     { name = "httpx-sse", specifier = ">=0.4" },
     { name = "pydantic", specifier = ">=2.7.2" },
-    { name = "sse-starlette", specifier = ">=2.0" },
+    { name = "sse-starlette", specifier = ">=1.6.1" },
     { name = "starlette", specifier = ">=0.27" },
 ]
 
@@ -499,16 +499,14 @@ wheels = [
 
 [[package]]
 name = "sse-starlette"
-version = "2.0.0"
+version = "1.6.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "anyio" },
     { name = "starlette" },
-    { name = "uvicorn" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/3c/54/9651ca960c0fbb997fb2a69dc01b29b182c643eb42a59b82623f7716054a/sse_starlette-2.0.0.tar.gz", hash = "sha256:0c43cc43aca4884c88c8416b65777c4de874cc4773e6458d3579c0a353dc2fb7", size = 18235 }
+sdist = { url = "https://files.pythonhosted.org/packages/40/88/0af7f586894cfe61bd212f33e571785c4570085711b24fb7445425a5eeb0/sse-starlette-1.6.1.tar.gz", hash = "sha256:6208af2bd7d0887c92f1379da14bd1f4db56bd1274cc5d36670c683d2aa1de6a", size = 14555 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/50/04/b1569f95ce91fbfe35e5e6b3b11e8373ffe4fa81e998818c8c995a873896/sse_starlette-2.0.0-py3-none-any.whl", hash = "sha256:c4dd134302cb9708d47cae23c365fe0a089aa2a875d2f887ac80f235a9ee5744", size = 9032 },
+    { url = "https://files.pythonhosted.org/packages/5e/f7/499e5d0c181a52a205d5b0982fd71cf162d1e070c97dca90c60520bbf8bf/sse_starlette-1.6.1-py3-none-any.whl", hash = "sha256:d8f18f1c633e355afe61cc5e9c92eea85badcb8b2d56ec8cfb0a006994aa55da", size = 9553 },
 ]
 
 [[package]]
@@ -588,17 +586,3 @@ sdist = { url = "https://files.pythonhosted.org/packages/df/db/f35a00659bc03fec3
 wheels = [
     { url = "https://files.pythonhosted.org/packages/26/9f/ad63fc0248c5379346306f8668cda6e2e2e9c95e01216d2b8ffd9ff037d0/typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d", size = 37438 },
 ]
-
-[[package]]
-name = "uvicorn"
-version = "0.32.1"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "click" },
-    { name = "h11" },
-    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/6a/3c/21dba3e7d76138725ef307e3d7ddd29b763119b3aa459d02cc05fefcff75/uvicorn-0.32.1.tar.gz", hash = "sha256:ee9519c246a72b1c084cea8d3b44ed6026e78a4a309cbedae9c37e4cb9fbb175", size = 77630 }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/50/c1/2d27b0a15826c2b71dcf6e2f5402181ef85acf439617bb2f1453125ce1f3/uvicorn-0.32.1-py3-none-any.whl", hash = "sha256:82ad92fd58da0d12af7482ecdb5f2470a04c9c9a53ced65b9bbb4a205377602e", size = 63828 },
-]