diff --git a/samples/to_dataframe/requirements.txt b/samples/to_dataframe/requirements.txt
index 6440b10d..b5ac6177 100644
--- a/samples/to_dataframe/requirements.txt
+++ b/samples/to_dataframe/requirements.txt
@@ -1,4 +1,4 @@
-google-auth==1.20.1
+google-auth==1.21.0
 google-cloud-bigquery-storage==1.0.0
 google-cloud-bigquery==1.25.0
 pyarrow==1.0.1