diff --git a/travis_test/requirements.txt b/travis_test/requirements.txt
old mode 100755
new mode 100644
index aa6d898..91f1574
--- a/travis_test/requirements.txt
+++ b/travis_test/requirements.txt
@@ -26,7 +26,7 @@ jsonpickle==1.1
 lazy-object-proxy==1.3.1
 markdown2==2.3.7
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 olefile==0.46
 packaging==19.0
 Pillow==5.4.1