diff --git a/conf.py b/conf.py
index d4e4eebe..8c7d877c 100644
--- a/conf.py
+++ b/conf.py
@@ -166,3 +166,8 @@ rst_epilog = """
 # -- -- Options for the nitpicky mode ----------------------------------------
 
 nitpicky = True
+
+
+# -- -- Options for warning control ------------------------------------------
+
+suppress_warnings = ["epub.unknown_project_files"]