diff --git a/sphinx-doc/requirements_sphinx.txt b/sphinx-doc/requirements_sphinx.txt
index e0bdab200b467eec10dc7eabc195ad53bc02da2a..995b80b46404c04f3e35969b44f7d2175842a079 100644
--- a/sphinx-doc/requirements_sphinx.txt
+++ b/sphinx-doc/requirements_sphinx.txt
@@ -44,7 +44,7 @@ python-intervals==1.10.0
 pytz==2019.3
 PyWavelets==1.1.1
 recommonmark==0.6.0
-regex==2020.7.14
+regex==2020.9.27
 requests==2.24.0
 scikit-learn==0.22.1
 scipy==1.4.1