diff --git a/requirements.txt b/requirements.txt
index c20a128..3231364 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ colcon-zsh==0.4.0
 command-not-found==0.3
 cov-core==1.15.0
 coverage==4.5
-cryptography==2.1.4
+cryptography==2.3
 cupshelpers==1.0
 cycler==0.10.0
 defer==1.0.6