diff --git a/dev-requirements.txt b/dev-requirements.txt
index c902267..5f3797b 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,7 +1,7 @@
 Sphinx>=1.5,<2
 pylint>=1.6,<2
 pytest>=3.0,<4
-coverage>=4.3,<5
+coverage>=4.3,<6
 git+https://github.com/wheerd/sphinx-autodoc-typehints.git@napoleon-master#egg=sphinx-autodoc-napoleon-typehints
 setuptools_scm>=1.15,<2.0
 tox>=2.5,<3.0