diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index 6e1ccbe6..a6c65ca6 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,3 +1,3 @@
-google-cloud-testutils==1.6.2
+google-cloud-testutils==1.6.4
 pytest===7.4.3; python_version == '3.7'
 pytest==8.3.5; python_version >= '3.8'
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 1fa22d1d..30eaa4f4 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,3 +1,3 @@
 google-cloud-bigquery-storage==2.31.0
 google-cloud-bigquery===3.30.0; python_version <= '3.8'
-google-cloud-bigquery==3.31.0; python_version >= '3.9'
+google-cloud-bigquery==3.33.0; python_version >= '3.9'
diff --git a/samples/to_dataframe/requirements.txt b/samples/to_dataframe/requirements.txt
index ec84fe81..cc4d98c8 100644
--- a/samples/to_dataframe/requirements.txt
+++ b/samples/to_dataframe/requirements.txt
@@ -1,7 +1,7 @@
-google-auth==2.40.1
+google-auth==2.40.2
 google-cloud-bigquery-storage==2.31.0
 google-cloud-bigquery===3.30.0; python_version <= '3.8'
-google-cloud-bigquery==3.31.0; python_version >= '3.9'
+google-cloud-bigquery==3.33.0; python_version >= '3.9'
 pyarrow===12.0.1; python_version == '3.7'
 pyarrow===17.0.0; python_version == '3.8'
 pyarrow==20.0.0; python_version >= '3.9'