diff --git a/.kokoro/docker/docs/requirements.txt b/.kokoro/docker/docs/requirements.txt
index 48ace5de..6beba704 100644
--- a/.kokoro/docker/docs/requirements.txt
+++ b/.kokoro/docker/docs/requirements.txt
@@ -66,7 +66,7 @@ tomli==2.2.1 \
     --hash=sha256:ece47d672db52ac607a3d9599a9d48dcb2f2f735c6c2d1f34130085bb12b112a \
     --hash=sha256:f4039b9cbc3048b2416cc57ab3bda989a6fcf9b36cf8937f01a6e731b64f80d7
     # via nox
-virtualenv==20.28.1 \
-    --hash=sha256:412773c85d4dab0409b83ec36f7a6499e72eaf08c80e81e9576bca61831c71cb \
-    --hash=sha256:5d34ab240fdb5d21549b76f9e8ff3af28252f5499fb6d6f031adac4e5a8c5329
+virtualenv==20.29.1 \
+    --hash=sha256:4e4cb403c0b0da39e13b46b1b2476e505cb0046b25f242bee80f62bf990b2779 \
+    --hash=sha256:b8b8970138d32fb606192cb97f6cd4bb644fa486be9308fb9b63f81091b5dc35
     # via nox
diff --git a/samples/to_dataframe/requirements.txt b/samples/to_dataframe/requirements.txt
index 900a88a7..d60abdd8 100644
--- a/samples/to_dataframe/requirements.txt
+++ b/samples/to_dataframe/requirements.txt
@@ -3,7 +3,7 @@ google-cloud-bigquery-storage==2.27.0
 google-cloud-bigquery==3.27.0
 pyarrow===12.0.1; python_version == '3.7'
 pyarrow===17.0.0; python_version == '3.8'
-pyarrow==18.1.0; python_version >= '3.9'
+pyarrow==19.0.0; python_version >= '3.9'
 ipython===7.31.1; python_version == '3.7'
 ipython===8.10.0; python_version == '3.8'
 ipython===8.18.1; python_version == '3.9'