diff --git a/requirements.txt b/requirements.txt
index 02881c6..ac2c3b9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mccabe==0.6.1
 parso==0.8.7
 pexpect==4.9.0
 pickleshare==0.7.5
-prompt-toolkit==1.0.18
+prompt-toolkit==3.0.53
 ptyprocess==0.7.0
 pycodestyle==2.4.0
 pyflakes==2.0.0