diff --git a/setup.py b/setup.py
index e8b949b..aeffe61 100644
--- a/setup.py
+++ b/setup.py
@@ -77,6 +77,7 @@ DEV_REQ = SETUP_REQS + TEST_REQS + COVERAGE_REQS + DOCS_REQS + [
     # *** Keep these in sync with the versions in .travis.yml and .pre-commit-config.yaml ***
     'flake8 < 3.7',
     'pydocstyle < 2.2',
+    # Pylint 2.2 drops Py2-specific checks: https://github.com/PyCQA/pylint/issues/1896
     'pylint < 2.2',
 ]