diff --git a/docs/source/conf.py b/docs/source/conf.py
index 20ae634..f9d35d2 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -12,7 +12,7 @@
 
 extensions = ["sphinx.ext.intersphinx"]
 templates_path = ["_templates"]
-source_suffix = ".rst"
+source_suffix = {".rst": "restructuredtext"}
 master_doc = "index"
 
 # General information about the project.