diff --git a/MANIFEST.in b/MANIFEST.in
index d856d44..3e5e947 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-recursive-include guessit *.py *.yml *.txt *.ini
+recursive-include guessit *.py *.yml *.txt *.ini *.json *.yaml *.yml
 recursive-exclude guessit *.pyc
 include LICENSE
 include *.rst