diff --git a/epydoc-config b/epydoc-config
index 7408eb55a..6c2e6b237 100644
--- a/epydoc-config
+++ b/epydoc-config
@@ -1,6 +1,7 @@
 [epydoc]
 
 modules: pymongo, gridfs
+exclude: pymongo._cbson
 output: html
 target: doc/
 verbosity: 1