diff --git a/a2a/slack_researcher/pyproject.toml b/a2a/slack_researcher/pyproject.toml
index d695138f..5ab6bfa6 100644
--- a/a2a/slack_researcher/pyproject.toml
+++ b/a2a/slack_researcher/pyproject.toml
@@ -7,7 +7,7 @@ dependencies = [
     "ag2[openai,mcp]>=0.14.0",
     "tavily-python>=0.7.26",
     "python-dotenv>=1.2.2",
-    "a2a-sdk[http-server]>=1.1.0",
+    "a2a-sdk[http-server]>=1.1.2",
     "urllib3>=2.7.0",   # Indirect; prevents CVE-2025-66418
     "python-multipart>=0.0.32", # Indirect; prevents CVE-2026-24486
 ]
diff --git a/a2a/slack_researcher/uv.lock b/a2a/slack_researcher/uv.lock
index dc996a49..2025973f 100644
--- a/a2a/slack_researcher/uv.lock
+++ b/a2a/slack_researcher/uv.lock
@@ -4,22 +4,21 @@ requires-python = ">=3.11, <3.13"
 
 [[package]]
 name = "a2a-sdk"
-version = "1.1.0"
+version = "1.1.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "culsans" },
     { name = "google-api-core" },
     { name = "googleapis-common-protos" },
     { name = "httpx" },
-    { name = "httpx-sse" },
     { name = "json-rpc" },
     { name = "packaging" },
     { name = "protobuf" },
     { name = "pydantic" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/c7/7e/8ac10bbf8b15b16574355f39b17dbdf617a282c27b41c7ff2116e30336df/a2a_sdk-1.1.0.tar.gz", hash = "sha256:e8102dad1b36709dbdc3d19319e38e6dfa3b3a79c30416030eb2d482576be204", size = 375726, upload-time = "2026-05-29T09:34:43.015Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/38/cc/59b35c518d8289bd59d20d9d216ca29ccb41c4697eb85971efe41d1adaf3/a2a_sdk-1.1.2.tar.gz", hash = "sha256:f928d8bf9a0dc0a473ee8258bd5226c1b8520a85c70e7f233c3b9b0e30a1bd10", size = 379627, upload-time = "2026-07-22T13:40:51.409Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d4/ea/3a5b160cfd51c67759b08748051094d9365ceff18127633d0021950c9860/a2a_sdk-1.1.0-py3-none-any.whl", hash = "sha256:d7f5846caf18033d8bf3108b11ec827dd8dd32f867c98848ede0e39474be93be", size = 241886, upload-time = "2026-05-29T09:34:41.484Z" },
+    { url = "https://files.pythonhosted.org/packages/c1/33/d414a03d5ef5a7d6d09a20dc9f8094e7fb9edb488662ff99c535a2a62cf1/a2a_sdk-1.1.2-py3-none-any.whl", hash = "sha256:eb9a698f526dc45a9ea967d7804e7aa363ff273d2c44fbed699bc68c9399f9c9", size = 245981, upload-time = "2026-07-22T13:40:49.484Z" },
 ]
 
 [package.optional-dependencies]
@@ -755,7 +754,7 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
-    { name = "a2a-sdk", extras = ["http-server"], specifier = ">=1.1.0" },
+    { name = "a2a-sdk", extras = ["http-server"], specifier = ">=1.1.2" },
     { name = "ag2", extras = ["openai", "mcp"], specifier = ">=0.14.0" },
     { name = "python-dotenv", specifier = ">=1.2.2" },
     { name = "python-multipart", specifier = ">=0.0.32" },