diff --git a/requirement.txt b/requirement.txt
index 43762b2..357884d 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -6,7 +6,7 @@ chardet==3.0.4
 click==6.7
 cloudpickle==0.5.3
 clyent==1.2.2
-cryptography==2.2.2
+cryptography==3.2
 cytoolz==0.9.0.1
 dask==0.17.5
 dataclasses==0.6