diff --git a/src/hush_cJSON.c b/src/hush_cJSON.c
index facf79f2a..1b996e881 100644
--- a/src/hush_cJSON.c
+++ b/src/hush_cJSON.c
@@ -1,3 +1,4 @@
+// Copyright (c) 2016-2022 The Hush developers
 
 /*
  Copyright (c) 2009 Dave Gamble
diff --git a/util/afl/hush-wrapper b/util/afl/hush-wrapper
index d316cae74..210ef1f01 100755
--- a/util/afl/hush-wrapper
+++ b/util/afl/hush-wrapper
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# Copyright (c) 2016-2022 The Hush developers
 
 set -ex -o pipefail
 
diff --git a/util/test-security-check.py b/util/test-security-check.py
index 324b7bcd8..0fee542ca 100755
--- a/util/test-security-check.py
+++ b/util/test-security-check.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python2
+# Copyright (c) 2016-2022 The Hush developers
 '''
 Test script for security-check.py
 '''