diff --git a/requirements.txt b/requirements.txt
index 3dfb08f..4f9aa2b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,15 +11,15 @@ automat==0.6.0
 axiom==0.7.5
 characteristic==14.3.0
 constantly==15.1.0
-cryptography==2.1.3
-eliot==1.2.0
+cryptography==2.1.4
+eliot==1.3.0
 enum34==1.1.6
 epsilon==0.7.1
 extras==1.0.0
 fixtures==3.0.0
 fusion-util==1.3.0
 hyperlink==17.3.1
-hypothesis==3.38.5
+hypothesis==3.40.1
 idna==2.6
 incremental==17.5.0
 ipaddress==1.0.18
@@ -28,7 +28,7 @@ pbr==3.1.1
 py2casefold==1.0.1
 pyasn1-modules==0.2.1
 pyasn1==0.4.2
-pyopenssl==17.4.0
+pyopenssl==17.5.0
 pyrsistent==0.14.1
 python-mimeparse==1.6.0
 service-identity==17.0.0