diff --git a/adk/pyproject.toml b/adk/pyproject.toml
index ed05c42..0ef7030 100644
--- a/adk/pyproject.toml
+++ b/adk/pyproject.toml
@@ -6,7 +6,7 @@ requires-python = ">=3.14,<3.15"
 dependencies = [
     "agentic-layer-sdk",
     "google-adk[a2a]>=1.26.0",
-    "a2a-sdk[http-server]>=0.3.25,<0.4",
+    "a2a-sdk[http-server]>=1.0.3,<1.1",
     "litellm>=1.83.0",
     "httpx-retries>=0.4.5",
     "opentelemetry-exporter-otlp-proto-http>=1.38.0",