diff --git a/docs/conf.py b/docs/conf.py
index 6296ac77..97fb5b22 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -239,7 +239,7 @@ def select_css(html_css_dir):
 # If true, keep warnings as "system message" paragraphs in the built documents.
 # keep_warnings = False
 
-suppress_warnings = []
+suppress_warnings = ['config.cache']
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False