diff --git a/README.md b/README.md
index baf0a8c..cfc4ae5 100644
--- a/README.md
+++ b/README.md
@@ -19,4 +19,6 @@ let filesList = map files fileGroups
 print filesList -- [["file1.mdx", "file2.mdx"], ["file3.mdx", "file4.mdx"]]
 ```
 
-you can for example, pass that list as a parameter for loading all of those dictionaries in [mdict-cpp](https://github.com/dictlab/mdict-cpp)
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+you can for example, pass that list as a parameter for loading all of those dictionaries in [mdict-cpp](https://github.com/dictlab/mdict-cpp)
+
+TODO: move the field *files* to only non-mdx files, and make a *mdx* field for the purpose mentioned above.
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