diff --git a/requirements/requirements.in b/requirements/requirements.in
index dff8dd4d26..678a599056 100644
--- a/requirements/requirements.in
+++ b/requirements/requirements.in
@@ -46,6 +46,7 @@ social-auth-core==1.5.0
 social-auth-app-django==2.0.0
 pyvmomi==6.5
 redbaron==0.6.3
+requests<2.16  # Older versions rely on certify
 requests-futures==0.9.7
 service-identity==16.0.0
 shade==1.20.0
diff --git a/requirements/requirements_ansible.in b/requirements/requirements_ansible.in
index b4ab5f60f6..e59e54c92c 100644
--- a/requirements/requirements_ansible.in
+++ b/requirements/requirements_ansible.in
@@ -23,6 +23,7 @@ psphere==0.5.2
 psutil==5.2.2
 pyvmomi==6.5
 pywinrm[kerberos]==0.2.2
+requests<2.16  # Older versions rely on certify
 secretstorage==2.3.1
 shade==1.20.0
 setuptools==36.0.1