diff --git a/requirements.txt b/requirements.txt
index bd3d179..cfa43be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,11 +6,12 @@ wheel==0.29.0
 blender-bam==1.1.7
 
 # Secondary requirements:
-cffi==1.6.0
-cryptography==1.3.1
-idna==2.1
+asn1crypto==0.24.0
+cffi==1.11.2
+cryptography==2.1.4
+idna==2.6
 pyasn1==0.1.9
-pycparser==2.14
-pyOpenSSL==16.0.0
+pycparser==2.18
+pyOpenSSL==17.5.0
 requests==2.10.0
-six==1.10.0
+six==1.11.0