diff --git a/requirements_docs.txt b/requirements_docs.txt
index 89f8f52f..75b22d35 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -1,4 +1,3 @@
-Sphinx>=1.2.3 
-Sphinx<=5.1.1
+Sphinx>=1.2.3
 sphinx_rtd_theme
 .