diff --git a/requirements.txt b/requirements.txt
index 9409ba4..8d055c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ certifi==2018.11.29
 chardet==3.0.4
 commonmark==0.8.1
 docutils==0.14
-future==0.17.1
+future==0.18.3
 idna==2.8
 imagesize==1.1.0
 jinja2==2.10