diff --git a/.changes/unreleased/Dependencies-20230816-195442.yaml b/.changes/unreleased/Dependencies-20230816-195442.yaml
new file mode 100644
index 000000000..850982f99
--- /dev/null
+++ b/.changes/unreleased/Dependencies-20230816-195442.yaml
@@ -0,0 +1,6 @@
+kind: "Dependencies"
+body: "Update tox requirement from ~=4.8 to ~=4.9"
+time: 2023-08-16T19:54:42.00000Z
+custom:
+  Author: dependabot[bot]
+  PR: 586
diff --git a/dev-requirements.txt b/dev-requirements.txt
index d65049019..b49896c69 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -24,7 +24,7 @@ pytest-dotenv~=0.5.2
 pytest-logbook~=1.2
 pytest-xdist~=3.3
 pytz~=2023.3
-tox~=4.8
+tox~=4.9
 types-pytz~=2023.3
 types-requests~=2.31
 twine~=4.0