diff --git a/.kokoro/requirements.txt b/.kokoro/requirements.txt
index c512535af4..336b2d29c7 100644
--- a/.kokoro/requirements.txt
+++ b/.kokoro/requirements.txt
@@ -12,9 +12,9 @@ cachetools==4.2.4 \
     --hash=sha256:89ea6f1b638d5a73a4f9226be57ac5e4f399d22770b92355f92dcb0f7f001693 \
     --hash=sha256:92971d3cb7d2a97efff7c7bb1657f21a8f5fb309a37530537c71b1774189f2d1
     # via google-auth
-certifi==2022.12.7 \
-    --hash=sha256:35824b4c3a97115964b408844d64aa14db1cc518f6562e8d7261699d1350a9e3 \
-    --hash=sha256:4ad3232f5e926d6718ec31cfc1fcadfde020920e278684144551c91769c7bc18
+certifi==2023.7.22 \
+    --hash=sha256:539cc1d13202e33ca466e88b2807e29f4c13049d6d87031a3c110744495cb082 \
+    --hash=sha256:92d6037539857d8206b8f6ae472e8b77db8058fec5937a1ef3f54304089edbb9
     # via
     #   -r requirements.in
     #   requests