diff --git a/requirements.txt b/requirements.txt
index 1ec17a7..efec2b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ certifi==2018.1.18
 chardet==3.0.4
 docutils==0.14
 idna==2.6
-imagesize==0.7.1
+imagesize==1.1.0
 Jinja2==2.10
 magicblue==0.5.0
 MarkupSafe==1.0