diff --git a/requirements/build.txt b/requirements/build.txt
index b3d02d0..bd7b90c 100644
--- a/requirements/build.txt
+++ b/requirements/build.txt
@@ -3,4 +3,4 @@
 # Requirements necessary to build the scratchdir package.
 
 pipenv==2020.11.15
-setuptools==51.1.0
+setuptools==66.1.1