diff --git a/docs/conf.py b/docs/conf.py
index dd6ccbd5..acbe7ae6 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -193,6 +193,7 @@ def setup(app):
      [author], 1)
 ]
 
+suppress_warnings = ['misc.highlighting_failure']
 
 # -- Options for Texinfo output -------------------------------------------