diff --git a/appengine/flexible/sendgrid/requirements.txt b/appengine/flexible/sendgrid/requirements.txt
index aee0e236006..a7a89a1d047 100644
--- a/appengine/flexible/sendgrid/requirements.txt
+++ b/appengine/flexible/sendgrid/requirements.txt
@@ -1,3 +1,3 @@
 Flask==0.12.2
-sendgrid==4.2.0
+sendgrid==4.2.1
 gunicorn==19.7.1
diff --git a/appengine/standard/sendgrid/requirements.txt b/appengine/standard/sendgrid/requirements.txt
index db9b503112d..db2abc67330 100644
--- a/appengine/standard/sendgrid/requirements.txt
+++ b/appengine/standard/sendgrid/requirements.txt
@@ -1 +1 @@
-sendgrid==4.2.0
+sendgrid==4.2.1
diff --git a/compute/encryption/requirements.txt b/compute/encryption/requirements.txt
index 934f59a5ced..27c4cdf30ba 100644
--- a/compute/encryption/requirements.txt
+++ b/compute/encryption/requirements.txt
@@ -1,2 +1,2 @@
-cryptography==2.0.2
+cryptography==2.0.3
 requests==2.18.3
diff --git a/iap/requirements.txt b/iap/requirements.txt
index 388256740ff..de13ed21554 100644
--- a/iap/requirements.txt
+++ b/iap/requirements.txt
@@ -1,5 +1,5 @@
 PyJWT==1.5.2
-cryptography==2.0.2
+cryptography==2.0.3
 google-auth==1.0.2
 requests==2.18.3
 requests_toolbelt==0.8.0
diff --git a/iot/api-client/mqtt_example/requirements.txt b/iot/api-client/mqtt_example/requirements.txt
index 5a55f616b0b..98693515816 100644
--- a/iot/api-client/mqtt_example/requirements.txt
+++ b/iot/api-client/mqtt_example/requirements.txt
@@ -1,3 +1,3 @@
-cryptography==2.0.2
+cryptography==2.0.3
 pyjwt==1.5.2
 paho-mqtt==1.3.0
diff --git a/testing/requirements.txt b/testing/requirements.txt
index 026fa4ac7c6..c68908f1c7e 100644
--- a/testing/requirements.txt
+++ b/testing/requirements.txt
@@ -9,7 +9,7 @@ pytest-cov==2.5.1
 pytest==3.2.0
 pytest-capturelog==0.7
 pyyaml==3.12
-responses==0.6.0
+responses==0.6.1
 WebTest==2.0.28
 webapp2==2.5.2
 google-api-python-client==1.6.2