diff --git a/requirements.txt b/requirements.txt
index cfb79c3..c978e38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 pyxpdf>=0.1.1
 pytest==6.0.0
-tox==3.19.0
+tox==3.24.1
 
 #build
 pip>=19.2.3