diff --git a/setup.py b/setup.py
index 26d691284..ec8174aae 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@
         'dev': [
             "coverage",
             "pytest",
-            "pytest-cov",
+            "pytest-cov<2.6.0",
             "pycodestyle",
             "sphinx",
             "sphinx_rtd_theme",