diff --git a/a2a/weather_service/pyproject.toml b/a2a/weather_service/pyproject.toml
index d75554f2..9b6267e1 100644
--- a/a2a/weather_service/pyproject.toml
+++ b/a2a/weather_service/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
     "protobuf>=6.33.5",         # Indirect; prevents CVE-2026-0994
     "starlette>=0.49.1",        # Indirect; prevents CVE-2025-62727
     "pyasn1>=0.6.3",            # Indirect; prevents CVE-2026-30922
-    "aiohttp>=3.13.3",          # Indirect; prevents CVE-2025-69223
+    "aiohttp>=3.13.5",          # Indirect; prevents CVE-2025-69223
 ]
 
 [project.scripts]