diff --git a/kokoro/gcp_ubuntu/requirements.txt b/kokoro/gcp_ubuntu/requirements.txt
index 20db1206..fc60dfd8 100644
--- a/kokoro/gcp_ubuntu/requirements.txt
+++ b/kokoro/gcp_ubuntu/requirements.txt
@@ -1,6 +1,6 @@
 # pip requirements generated from pypi
 pip==25.3 --hash=sha256:8d0538dbbd7babbd207f261ed969c65de439f6bc9e5dbd3b3b9a77f25d95f343 --hash=sha256:9655943313a94722b7774661c21049070f6bbb0a1516bf02f7c8d5d9201514cd
-virtualenv==20.26.6 --hash=sha256:280aede09a2a5c317e409a00102e7077c6432c5a38f0ef938e643805a7ad2c48 --hash=sha256:7345cc5b25405607a624d8418154577459c3e0277f5466dd79c49d5e492995f2
+virtualenv==20.36.1 --hash=sha256:575a8d6b124ef88f6f51d56d656132389f961062a9177016a50e4f507bbcc19f --hash=sha256:8befb5c81842c641f8ee658481e42641c68b5eab3521d8e092d18320902466ba
 distlib==0.3.8 --hash=sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784
 filelock==3.20.1 --hash=sha256:15d9e9a67306188a44baa72f569d2bfd803076269365fdea0934385da4dc361a --hash=sha256:b8360948b351b80f420878d8516519a2204b07aefcdcfd24912a5d33127f188c
 platformdirs==4.2.2 --hash=sha256:2d7a1657e36a80ea911db832a8a6ece5ee53d8de21edd5cc5879af6530b1bfee