diff --git a/simple-topo/requirements.txt b/simple-topo/requirements.txt
index 5fe0253..f21c3c0 100644
--- a/simple-topo/requirements.txt
+++ b/simple-topo/requirements.txt
@@ -1,7 +1,7 @@
 adium-theme-ubuntu==0.3.4
 boto==2.38.0
 chardet==2.3.0
-cryptography==1.2.3
+cryptography==3.2
 duplicity==0.7.6
 enum34==1.1.2
 idna==2.0