diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index e90d0443c..4f8e5641f 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,5 +1,5 @@
-google-cloud-bigquery[pandas]==1.3.0
+google-cloud-bigquery[pandas]==1.7.0
 google-auth-oauthlib==0.2.0
-ipython
-matplotlib
-pytz==2018.3
+ipython==7.1.1
+matplotlib==3.0.2
+pytz==2018.7