diff --git a/requirements.txt b/requirements.txt
index f371e894f..255d55a3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@
 # https://github.com/readthedocs/readthedocs.org/blob/master/requirements/local-docs-build.txt
 sphinx==3.5.2
 sphinx_rtd_theme==0.5.2
+docutils<0.18
 
 # Code tabs extension for GDScript/C#
 # Stay on 1.3.0 until https://github.com/readthedocs/readthedocs-sphinx-search/issues/82 is fixed.