diff --git a/a2a/weather_service/pyproject.toml b/a2a/weather_service/pyproject.toml
index b6bd6e99..7d494269 100644
--- a/a2a/weather_service/pyproject.toml
+++ b/a2a/weather_service/pyproject.toml
@@ -9,7 +9,7 @@ readme = "README.md"
 license = { text = "Apache" }
 requires-python = ">=3.11"
 dependencies = [
-    "a2a-sdk>=0.2.16",
+    "a2a-sdk>=0.3.26",
     "langgraph>=1.1.3",
     "langchain-core>=1.2.11",
     "langchain-community>=0.3.27",