Merge pull request #128 from pallets/dependabot/pip/pip-tools-5.2.1

diff --git a/requirements/dev.txt b/requirements/dev.txt
index 2b3f621..544586f 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -14,7 +14,7 @@
 more-itertools==8.3.0     # via pytest
 nodeenv==1.3.5            # via pre-commit
 packaging==20.4           # via pytest, tox
-pip-tools==5.2.0          # via -r requirements/dev.in
+pip-tools==5.2.1          # via -r requirements/dev.in
 pluggy==0.13.1            # via pytest, tox
 pre-commit==2.5.0         # via -r requirements/dev.in
 py==1.8.1                 # via pytest, tox