diff --git a/setup.cfg b/setup.cfg
index aca586c..c035d56 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,9 +5,13 @@ test=pytest
 universal=1
 
 [metadata]
+# We document the reasoning for using ranges here:
+# http://flake8.pycqa.org/en/latest/faq.html#why-does-flake8-use-ranges-for-its-dependencies
+# And in which releases we will update those ranges here:
+# http://flake8.pycqa.org/en/latest/internal/releases.html#releasing-flake8
 requires-dist =
     enum34; python_version<"3.4"
     configparser; python_version<"3.2"
-    pyflakes >= 1.5.0, < 1.6.0
+    pyflakes >= 1.5.0, < 1.7.0
     pycodestyle >= 2.0.0, < 2.4.0
     mccabe >= 0.6.0, < 0.7.0
diff --git a/setup.py b/setup.py
index 4d40862..aa45e43 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,11 @@ tests_require = ['mock >= 2.0.0', 'pytest']
 # NOTE(sigmavirus24): When updating these requirements, update them in
 # setup.cfg as well.
 requires = [
-    "pyflakes >= 1.5.0, < 1.6.0",
+    # We document the reasoning for using ranges here:
+    # http://flake8.pycqa.org/en/latest/faq.html#why-does-flake8-use-ranges-for-its-dependencies
+    # And in which releases we will update those ranges here:
+    # http://flake8.pycqa.org/en/latest/internal/releases.html#releasing-flake8
+    "pyflakes >= 1.5.0, < 1.7.0",
     "pycodestyle >= 2.0.0, < 2.4.0",
     "mccabe >= 0.6.0, < 0.7.0",
     "setuptools >= 30",