diff --git a/requirements.dev.txt b/requirements.dev.txt
index be3f8fa31..5bb3705ad 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -6,4 +6,4 @@ coverage
 flake8
 doctest-ignore-unicode==0.1.2
 berkeleydb
-black==21.7b0
+black==21.8b0
diff --git a/setup.py b/setup.py
index a769b2558..9ef5689d6 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     "nose==1.3.7",
     "nose-timer",
     "coverage",
-    "black==21.7b0",
+    "black==21.8b0",
     "flake8",
     "doctest-ignore-unicode==0.1.2",
 ]