diff --git a/pyproject.toml b/pyproject.toml
index 0a973f94..8ece4db8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,6 +76,12 @@ dev = [
   # go/keep-sorted end
 ]
 
+a2a = [
+  # go/keep-sorted start
+  "a2a-sdk>=0.2.7;python_version>='3.10'"
+  # go/keep-sorted end
+]
+
 eval = [
   # go/keep-sorted start
   "google-cloud-aiplatform[evaluation]>=1.87.0",