diff --git a/requirements.dev.txt b/requirements.dev.txt
index da3486d..3c7d7c1 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -7,7 +7,7 @@ cffi==1.11.5
 chardet==3.0.4
 click==6.7
 -e git+https://github.com/alces-software/click-repl.git@6a809b2af43054035027618f9fd37af4c31a8abc#egg=click_repl
-cryptography==2.3.1
+cryptography==3.2
 DateTime==4.2
 decorator==4.0.11
 fabric==2.4.0
diff --git a/requirements.txt b/requirements.txt
index da3486d..3c7d7c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ cffi==1.11.5
 chardet==3.0.4
 click==6.7
 -e git+https://github.com/alces-software/click-repl.git@6a809b2af43054035027618f9fd37af4c31a8abc#egg=click_repl
-cryptography==2.3.1
+cryptography==3.2
 DateTime==4.2
 decorator==4.0.11
 fabric==2.4.0