diff --git a/tox.ini b/tox.ini
index e19cc5a..aeb47f1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ commands =
     mypy --ignore-missing-imports fimfarchive
 deps =
     -rrequirements.txt
+    pyflakes>=1.6.0
     pytest
     flake8
     mypy