diff --git a/changelog.d/9734.misc b/changelog.d/9734.misc
new file mode 100644
index 000000000..20ed9a06a
--- /dev/null
+++ b/changelog.d/9734.misc
@@ -0,0 +1 @@
+Pin flake8-bugbear's version.
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 1939a7b86..29e9971dc 100755
--- a/setup.py
+++ b/setup.py
@@ -99,7 +99,7 @@ CONDITIONAL_REQUIREMENTS["lint"] = [
     "isort==5.7.0",
     "black==20.8b1",
     "flake8-comprehensions",
-    "flake8-bugbear",
+    "flake8-bugbear==21.3.2",
     "flake8",
 ]