diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9c85453..d13b7ad 100755
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,5 +1,5 @@
 # Documentation
-sphinx==2.4.4
+sphinx==3.0.2
 sphinx_rtd_theme==0.4.3
 numpydoc==0.9.2