diff --git a/samples/geography/requirements.txt b/samples/geography/requirements.txt
index b4865e937..c602a40fc 100644
--- a/samples/geography/requirements.txt
+++ b/samples/geography/requirements.txt
@@ -1,5 +1,5 @@
 attrs==21.4.0
-certifi==2022.5.18
+certifi==2022.5.18.1
 cffi==1.15.0
 charset-normalizer==2.0.12
 click==8.1.3
@@ -18,7 +18,7 @@ google-cloud-core==2.3.0
 google-crc32c==1.3.0
 google-resumable-media==2.3.3
 googleapis-common-protos==1.56.1
-grpcio==1.46.1
+grpcio==1.46.3
 idna==3.3
 libcst==0.4.3
 munch==2.5.0
diff --git a/samples/magics/requirements.txt b/samples/magics/requirements.txt
index f26b4dc9b..ad64565e2 100644
--- a/samples/magics/requirements.txt
+++ b/samples/magics/requirements.txt
@@ -1,11 +1,11 @@
 db-dtypes==1.0.1
 google-cloud-bigquery-storage==2.13.1
 google-auth-oauthlib==0.5.1
-grpcio==1.46.1
+grpcio==1.46.3
 ipython===7.31.1; python_version == '3.7'
 ipython===8.0.1; python_version == '3.8'
 ipython==8.3.0; python_version >= '3.9'
-matplotlib==3.5.1
+matplotlib==3.5.2
 pandas===1.3.5; python_version == '3.7'
 pandas==1.4.2; python_version >= '3.8'
 pyarrow==8.0.0
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index cf682fd77..ad64565e2 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,7 +1,7 @@
 db-dtypes==1.0.1
 google-cloud-bigquery-storage==2.13.1
 google-auth-oauthlib==0.5.1
-grpcio==1.46.1
+grpcio==1.46.3
 ipython===7.31.1; python_version == '3.7'
 ipython===8.0.1; python_version == '3.8'
 ipython==8.3.0; python_version >= '3.9'