diff --git a/riotfile.py b/riotfile.py
index ab6b9e7850d..0e05de71c29 100644
--- a/riotfile.py
+++ b/riotfile.py
@@ -88,7 +88,12 @@ def select_pys(min_version=MIN_PYTHON_VERSION, max_version=MAX_PYTHON_VERSION):
     venvs=[
         Venv(
             pys=["3"],
-            pkgs={"black": "==21.4b2", "isort": [latest]},
+            pkgs={
+                "black": "==21.4b2",
+                "isort": [latest],
+                # See https://github.com/psf/black/issues/2964 for incompatibility with click==8.1.0
+                "click": "<8.1.0",
+            },
             venvs=[
                 Venv(
                     name="fmt",