diff --git a/requirements_dev.txt b/requirements_dev.txt
index c830438..61edbb4 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,5 +11,5 @@ pytest-sugar==0.9.3
 coveralls==2.0.0
 ase==3.19.1
 schnetpack==0.3
-sphinx==3.0.4
+sphinx==3.1.0
 sphinx-rtd-theme==0.4.3