diff --git a/requirements-dev.txt b/requirements-dev.txt
index afec45c..afea46b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,5 +3,5 @@ h5py==2.8.0
 pytest==3.10.1
 numpy==1.15.4
 pytest-pep8==1.0.6
-pytest-cov==2.6.0
+pytest-cov==2.8.1
 coveralls==1.5.1