diff --git a/vertexai/stream-multimodality-basic/go.mod b/vertexai/stream-multimodality-basic/go.mod
index 6bde62625f..d0626118cc 100644
--- a/vertexai/stream-multimodality-basic/go.mod
+++ b/vertexai/stream-multimodality-basic/go.mod
@@ -46,7 +46,7 @@ require (
 	go.opentelemetry.io/otel/trace v1.34.0 // indirect
 	golang.org/x/crypto v0.32.0 // indirect
 	golang.org/x/net v0.34.0 // indirect
-	golang.org/x/oauth2 v0.25.0 // indirect
+	golang.org/x/oauth2 v0.27.0 // indirect
 	golang.org/x/sync v0.10.0 // indirect
 	golang.org/x/sys v0.29.0 // indirect
 	golang.org/x/text v0.21.0 // indirect
diff --git a/vertexai/stream-multimodality-basic/go.sum b/vertexai/stream-multimodality-basic/go.sum
index adc5b553ef..16459763e4 100644
--- a/vertexai/stream-multimodality-basic/go.sum
+++ b/vertexai/stream-multimodality-basic/go.sum
@@ -103,8 +103,8 @@ golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
 golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
 golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
 golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
-golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70=
-golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.27.0 h1:da9Vo7/tDv5RH/7nZDz1eMGS/q1Vv1N/7FCrBhI9I3M=
+golang.org/x/oauth2 v0.27.0/go.mod h1:onh5ek6nERTohokkhCD/y2cV4Do3fxFHFuAejCkRWT8=
 golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=