diff --git a/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.h b/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.h
index 37f981eb636..f31df233fa2 100644
--- a/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.h
+++ b/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.h
@@ -1,5 +1,8 @@
 /*
-     File: UIImageEffects.h
+ Copied from
+ https://github.com/robovm/apple-ios-samples/blob/1f6b14ef6e2bda610ef8f1c93b16bf76b8594fbb/UIImageEffects/UIImageEffects/UIImageEffects.h
+
+ File: UIImageEffects.h
  Abstract: This class contains methods to apply blur and tint effects to an image.
  This is the code you’ll want to look out to find out how to use vImage to
  efficiently calculate a blur.
diff --git a/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.m b/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.m
index ad2b777d4cc..5ff40ad4569 100644
--- a/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.m
+++ b/Samples/TrendingMovies/TrendingMovies/ImageProcessing/UIImageEffects.m
@@ -1,5 +1,8 @@
 /*
-     File: UIImageEffects.m
+ Copied from
+ https://github.com/robovm/apple-ios-samples/blob/1f6b14ef6e2bda610ef8f1c93b16bf76b8594fbb/UIImageEffects/UIImageEffects/UIImageEffects.m
+
+ File: UIImageEffects.m
  Abstract: This class contains methods to apply blur and tint effects to an image.
  This is the code you’ll want to look out to find out how to use vImage to
  efficiently calculate a blur.
diff --git a/SentryTestUtils/Dynamic/Dynamic.swift b/SentryTestUtils/Dynamic/Dynamic.swift
index e5b8ec39df9..4bc544762c1 100644
--- a/SentryTestUtils/Dynamic/Dynamic.swift
+++ b/SentryTestUtils/Dynamic/Dynamic.swift
@@ -1,3 +1,4 @@
+//  Copied from https://github.com/mhdhejazi/Dynamic/blob/772883073d044bc754d401cabb6574624eb3778f/Sources/Dynamic/Dynamic.swift
 //
 //  Dynamic
 //  Created by Mhd Hejazi on 4/15/20.
diff --git a/SentryTestUtils/Dynamic/Invocation.swift b/SentryTestUtils/Dynamic/Invocation.swift
index 2a9b36138fe..b80764db75a 100644
--- a/SentryTestUtils/Dynamic/Invocation.swift
+++ b/SentryTestUtils/Dynamic/Invocation.swift
@@ -1,3 +1,4 @@
+//  Copied from https://github.com/mhdhejazi/Dynamic/blob/772883073d044bc754d401cabb6574624eb3778f/Sources/Dynamic/Invocation.swift
 //
 //  Dynamic
 //  Created by Mhd Hejazi on 4/15/20.
diff --git a/SentryTestUtils/Dynamic/Logger.swift b/SentryTestUtils/Dynamic/Logger.swift
index 52077cc69bf..cd757bb8dfb 100644
--- a/SentryTestUtils/Dynamic/Logger.swift
+++ b/SentryTestUtils/Dynamic/Logger.swift
@@ -1,4 +1,5 @@
-//
+//  Copied from https://github.com/mhdhejazi/Dynamic/blob/772883073d044bc754d401cabb6574624eb3778f/Sources/Dynamic/Logger.swift
+// 
 //  Dynamic
 //  Created by Mhd Hejazi on 4/15/20.
 //  Copyright © 2020 Samabox. All rights reserved.
diff --git a/SentryTestUtils/Dynamic/TypeMapping.swift b/SentryTestUtils/Dynamic/TypeMapping.swift
index a03d8ea85aa..bace68ef8e0 100644
--- a/SentryTestUtils/Dynamic/TypeMapping.swift
+++ b/SentryTestUtils/Dynamic/TypeMapping.swift
@@ -1,3 +1,4 @@
+//  Copied from https://github.com/mhdhejazi/Dynamic/blob/772883073d044bc754d401cabb6574624eb3778f/Sources/Dynamic/TypeMapping.swift
 //
 //  Dynamic
 //  Created by Mhd Hejazi on 4/18/20.
diff --git a/Sources/Sentry/SentryReachability.m b/Sources/Sentry/SentryReachability.m
index 3af2292bc13..3157f10cbdb 100644
--- a/Sources/Sentry/SentryReachability.m
+++ b/Sources/Sentry/SentryReachability.m
@@ -1,5 +1,5 @@
-//
-//  SentryReachability.m
+// Adapted from
+// https://github.com/bugsnag/bugsnag-cocoa/blob/2f373f21b965f1b13d7070662e2d35f46c17d975/Bugsnag/Delivery/BSGConnectivity.m
 //
 //  Created by Jamie Lynch on 2017-09-04.
 //
diff --git a/Sources/Sentry/include/SentryReachability.h b/Sources/Sentry/include/SentryReachability.h
index bfd62b80600..029b5aaf787 100644
--- a/Sources/Sentry/include/SentryReachability.h
+++ b/Sources/Sentry/include/SentryReachability.h
@@ -1,5 +1,5 @@
-//
-//  SentryReachability.h
+// Adapted from
+// https://github.com/bugsnag/bugsnag-cocoa/blob/2f373f21b965f1b13d7070662e2d35f46c17d975/Bugsnag/Delivery/BSGConnectivity.h
 //
 //  Created by Jamie Lynch on 2017-09-04.
 //