diff --git a/packages/google-cloud-texttospeech/.github/.OwlBot.lock.yaml b/packages/google-cloud-texttospeech/.github/.OwlBot.lock.yaml
index 17c21d96d654..0ddd0e4d1873 100644
--- a/packages/google-cloud-texttospeech/.github/.OwlBot.lock.yaml
+++ b/packages/google-cloud-texttospeech/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:f8ca7655fa8a449cadcabcbce4054f593dcbae7aeeab34aa3fcc8b5cf7a93c9e
-# created: 2023-07-21T02:12:46.49799314Z
+  digest: sha256:6c1cbc75c74b8bdd71dada2fa1677e9d6d78a889e9a70ee75b93d1d0543f96e1
+# created: 2023-07-25T21:01:10.396410762Z
diff --git a/packages/google-cloud-texttospeech/.kokoro/requirements.txt b/packages/google-cloud-texttospeech/.kokoro/requirements.txt
index b563eb284459..76d9bba0f7d0 100644
--- a/packages/google-cloud-texttospeech/.kokoro/requirements.txt
+++ b/packages/google-cloud-texttospeech/.kokoro/requirements.txt
@@ -20,9 +20,9 @@ cachetools==5.2.0 \
     --hash=sha256:6a94c6402995a99c3970cc7e4884bb60b4a8639938157eeed436098bf9831757 \
     --hash=sha256:f9f17d2aec496a9aa6b76f53e3b614c965223c061982d434d160f930c698a9db
     # via google-auth
-certifi==2022.12.7 \
-    --hash=sha256:35824b4c3a97115964b408844d64aa14db1cc518f6562e8d7261699d1350a9e3 \
-    --hash=sha256:4ad3232f5e926d6718ec31cfc1fcadfde020920e278684144551c91769c7bc18
+certifi==2023.7.22 \
+    --hash=sha256:539cc1d13202e33ca466e88b2807e29f4c13049d6d87031a3c110744495cb082 \
+    --hash=sha256:92d6037539857d8206b8f6ae472e8b77db8058fec5937a1ef3f54304089edbb9
     # via requests
 cffi==1.15.1 \
     --hash=sha256:00a9ed42e88df81ffae7a8ab6d9356b371399b91dbdf0c3cb1e84c03a13aceb5 \