diff --git a/MANIFEST.in b/MANIFEST.in
index f4e704ed..169d08f5 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-include dependency_injector/*
+recursive-include dependency_injector *.py *.pyx *.pxd *.c
 include README.rst
 include CONTRIBUTORS.rst
 include LICENSE.rst