diff --git a/appengine/flexible/endpoints/requirements.txt b/appengine/flexible/endpoints/requirements.txt
index de43c6fb1ea..2ca54159a2c 100644
--- a/appengine/flexible/endpoints/requirements.txt
+++ b/appengine/flexible/endpoints/requirements.txt
@@ -3,6 +3,6 @@ flask-cors==3.0.0
 gunicorn==19.6.0
 gcloud==0.18.1
 six==1.10.0
-pyyaml==3.11
+pyyaml==3.12
 requests==2.11.1
 google-api-python-client==1.5.2
diff --git a/compute/encryption/requirements.txt b/compute/encryption/requirements.txt
index f71a26daa1b..4239c466e0a 100644
--- a/compute/encryption/requirements.txt
+++ b/compute/encryption/requirements.txt
@@ -1,2 +1,2 @@
-cryptography==1.4
+cryptography==1.5
 requests==2.11.1
diff --git a/requirements-dev.in b/requirements-dev.in
index 4d35396eb41..03cc6e64b85 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -7,6 +7,6 @@ mysql-python==1.2.5
 PyCrypto==2.6.1
 pytest-cov==2.3.1
 pytest==3.0.1
-pyyaml==3.11
+pyyaml==3.12
 responses==0.5.1
 WebTest==2.0.23
diff --git a/requirements-dev.txt b/requirements-dev.txt
index a93b8d8ffde..7e5e1ce8000 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 # This file is generated by nox -s reqrollup. Do not edit.
 beautifulsoup4==4.5.1
 coverage==4.2
-cryptography==1.4
+cryptography==1.5
 Django==1.10
 flaky==3.3.0
 flask-cors==3.0.0
@@ -33,7 +33,7 @@ pymemcache==1.3.6
 PyMySQL==0.7.6
 pytest-cov==2.3.1
 pytest==3.0.1
-pyyaml==3.11
+pyyaml==3.12
 redis==2.10.5
 requests-toolbelt==0.7.0
 requests==2.11.1