diff --git a/pyproject.toml b/pyproject.toml
index e1ab0d7d4..2b0d9dd3f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,8 +64,8 @@ docs = [
 ]
 
 a2a = [
-    "a2a-sdk>=0.3.0,<0.4.0",
-    "a2a-sdk[sql]>=0.3.0,<0.4.0",
+    "a2a-sdk>=0.3.0,<1.1.0",
+    "a2a-sdk[sql]>=0.3.0,<1.1.0",
     "uvicorn>=0.34.2,<1.0.0",
     "httpx>=0.28.1,<1.0.0",
     "fastapi>=0.115.12,<1.0.0",