diff --git a/ios/flutter_string_encryption.podspec b/ios/flutter_string_encryption.podspec
index 964acd8..6b94008 100644
--- a/ios/flutter_string_encryption.podspec
+++ b/ios/flutter_string_encryption.podspec
@@ -15,7 +15,7 @@ Cross-platform string encryption using common best-practices
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
   s.dependency 'Flutter'
-  s.dependency 'SCrypto', '~> 2.0'
+  s.dependency 'SCrypto', '~> 4.0.0'
   s.static_framework = true
 
   s.ios.deployment_target = '9.0'