diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 79490e8..9017373
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ idna==2.8
 imageio==2.5.0
 incremental==17.5.0
 ipykernel==5.1.1
-ipython==7.4.0
+ipython==7.16.3
 ipython-genutils==0.2.0
 ipywidgets==7.4.2
 iSearch==1.0.2