diff --git a/requirements_dev.txt b/requirements_dev.txt
index e5d221395a4b7eb5aff4b4e0cfd73150f3325905..4cb4edd4f4dd0f41a32b434e4e8ca13d5d6199c8 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -14,4 +14,5 @@ sphinx-rtd-theme==0.4.3
 numpy==1.16.2
 recordtype==1.3
 xarray==0.11.3
+matplotlib==3.0.2