diff --git a/kokoro/gcp_ubuntu/requirements.txt b/kokoro/gcp_ubuntu/requirements.txt
index 4bec0537f..2dccffb99 100644
--- a/kokoro/gcp_ubuntu/requirements.txt
+++ b/kokoro/gcp_ubuntu/requirements.txt
@@ -1,6 +1,6 @@
 # pip requirements generated from pypi
 pip==26.2 --hash=sha256:2d8542afcc84cdd8e846c2b36b2861fad1da376dd98f8e7113e9108a3c331690 --hash=sha256:931c303696af6fa3417112103b1cad26890e5a07eccb5b99783700e33f2b8aad
-virtualenv==20.36.1 --hash=sha256:575a8d6b124ef88f6f51d56d656132389f961062a9177016a50e4f507bbcc19f --hash=sha256:8befb5c81842c641f8ee658481e42641c68b5eab3521d8e092d18320902466ba
+virtualenv==21.14.9 --hash=sha256:4d1bee354cd81c820da3bee56e38be3426490f8d1fc54e10ea5b2072ebad8ef8 --hash=sha256:ac51744da66ae56ff814b087d65096c94de698ec520adc624b108b679655809b
 distlib==0.3.8 --hash=sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784
 filelock==3.20.3 --hash=sha256:18c57ee915c7ec61cff0ecf7f0f869936c7c30191bb0cf406f1341778d0834e1 --hash=sha256:4b0dda527ee31078689fc205ec4f1c1bf7d56cf88b6dc9426c4f230e46c2dce1
 platformdirs==4.2.2 --hash=sha256:2d7a1657e36a80ea911db832a8a6ece5ee53d8de21edd5cc5879af6530b1bfee