diff --git a/FileProvider.podspec b/FileProvider.podspec
index af27f58..7f4e761 100644
--- a/FileProvider.podspec
+++ b/FileProvider.podspec
@@ -93,7 +93,7 @@ Pod::Spec.new do |s|
   #  Not including the public_header_files will make all headers public.
   #
 
-  s.source_files  = "Sources/*.swift"
+  s.source_files  = "Sources/**/*.swift"
   s.exclude_files = "Sources/Exclude"
 
   # s.public_header_files = "Classes/**/*.h"