diff --git a/conda_requirements.txt b/conda_requirements.txt
index d2ac2df..1b621c8 100644
--- a/conda_requirements.txt
+++ b/conda_requirements.txt
@@ -1,7 +1,7 @@
 bokeh==0.11.1
 certifi==2016.2.28
 cffi==1.6.0
-cryptography==1.3.2
+cryptography==3.3.2
 cycler==0.10.0
 decorator==4.0.9
 enum34==1.1.6
diff --git a/py3_requirements.txt b/py3_requirements.txt
index 9161a23..1e58b1a 100644
--- a/py3_requirements.txt
+++ b/py3_requirements.txt
@@ -4,7 +4,7 @@ backports.ssl-match-hostname==3.5.0.1
 bokeh==0.11.1
 certifi==2016.2.28
 cffi==1.6.0
-cryptography==1.3.2
+cryptography==3.3.2
 cycler==0.10.0
 decorator==4.0.9
 entrypoints==0.2.1
diff --git a/py3_server_requirements.txt b/py3_server_requirements.txt
index c870d1e..9d31994 100644
--- a/py3_server_requirements.txt
+++ b/py3_server_requirements.txt
@@ -5,7 +5,7 @@ bokeh==0.11.1
 certifi==2016.2.28
 cffi==1.6.0
 chardet==2.3.0
-cryptography==1.3.2
+cryptography==3.3.2
 cssselect==0.9.1
 cycler==0.10.0
 Cython==0.24.1
diff --git a/requirements.txt b/requirements.txt
index ec17770..2d759c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ bokeh==0.11.1
 certifi==2016.2.28
 cffi==1.6.0
 configparser==3.3.0.post2
-cryptography==1.3.2
+cryptography==3.3.2
 cycler==0.10.0
 decorator==4.0.9
 entrypoints==0.2.1