diff --git a/requirements.txt b/requirements.txt
index 97b4e227..f26db405 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ backports.functools-lru-cache==1.5
 binaryornot==0.4.4
 bumpversion==0.5.3
 certifi==2018.4.16
-cffi==1.11.5
+cffi==1.17.1
 chardet==3.0.4
 click==6.7
 configparser==3.5.0
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5404d8d3..aa3be84d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ backports.functools-lru-cache==1.5
 binaryornot==0.4.4
 bumpversion==0.5.3
 certifi==2018.4.16
-cffi==1.11.5
+cffi==1.17.1
 chardet==3.0.4
 click==6.7
 configparser==3.5.0