diff --git a/EPSignature.podspec b/EPSignature.podspec
index 1a2784c..4de3644 100644
--- a/EPSignature.podspec
+++ b/EPSignature.podspec
@@ -22,6 +22,6 @@ DESC
   s.platform     = :ios, '9.0'
   s.requires_arc = true
 
-  s.source_files = 'Pod/Classes/**/*'
+  s.source_files = 'Pod/Classes/**/*.swift'
   s.resources        = ["Pod/Classes/EPSignatureViewController.xib"]
 end