diff --git a/tools/lint-requirements.txt b/tools/lint-requirements.txt
new file mode 100644
index 000000000..a19517e78
--- /dev/null
+++ b/tools/lint-requirements.txt
@@ -0,0 +1,2 @@
+flake8 == 3.3.0
+isort == 4.2.5
diff --git a/tox.ini b/tox.ini
index 9790a5019..866db977f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,9 +34,7 @@ commands =
     python setup.py check -m -r -s
 
 [lint]
-deps =
-    flake8==3.3.0
-    isort==4.2.5
+deps = -r{toxinidir}/tools/lint-requirements.txt
 commands =
     flake8 .
     isort --recursive --check-only --diff src/pip tests