diff --git a/bind.go b/bind.go
index 51f4689e7..353c51325 100644
--- a/bind.go
+++ b/bind.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/bind_test.go b/bind_test.go
index cffccfb35..c0272e712 100644
--- a/bind_test.go
+++ b/bind_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/binder.go b/binder.go
index 8e7b81413..ebabeaf96 100644
--- a/binder.go
+++ b/binder.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/binder_external_test.go b/binder_external_test.go
index f1aecb52b..e44055a23 100644
--- a/binder_external_test.go
+++ b/binder_external_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 // run tests as external package to get real feel for API
 package echo_test
 
diff --git a/binder_test.go b/binder_test.go
index 0b27cae64..d552b604d 100644
--- a/binder_test.go
+++ b/binder_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/context.go b/context.go
index d917f3bc9..2b4acae32 100644
--- a/context.go
+++ b/context.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/context_fs.go b/context_fs.go
index 1038f892e..1c25baf12 100644
--- a/context_fs.go
+++ b/context_fs.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/context_fs_test.go b/context_fs_test.go
index 51346c956..83232ea45 100644
--- a/context_fs_test.go
+++ b/context_fs_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/context_test.go b/context_test.go
index 4ca2cc84b..463e10a60 100644
--- a/context_test.go
+++ b/context_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/echo.go b/echo.go
index eb8a79f38..4d11af04a 100644
--- a/echo.go
+++ b/echo.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 /*
 Package echo implements high performance, minimalist Go web framework.
 
diff --git a/echo_fs.go b/echo_fs.go
index 9f83a0351..a7b231f31 100644
--- a/echo_fs.go
+++ b/echo_fs.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/echo_fs_test.go b/echo_fs_test.go
index eb072a28d..e882a0682 100644
--- a/echo_fs_test.go
+++ b/echo_fs_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/echo_test.go b/echo_test.go
index 416479191..f09544127 100644
--- a/echo_test.go
+++ b/echo_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/group.go b/group.go
index 749a5caab..e69d80b7f 100644
--- a/group.go
+++ b/group.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/group_fs.go b/group_fs.go
index aedc4c6a9..c1b7ec2d3 100644
--- a/group_fs.go
+++ b/group_fs.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/group_fs_test.go b/group_fs_test.go
index 958d9efb1..8bcd547d1 100644
--- a/group_fs_test.go
+++ b/group_fs_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/group_test.go b/group_test.go
index d22f564b0..a97371418 100644
--- a/group_test.go
+++ b/group_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/ip.go b/ip.go
index 905268abf..5374dc018 100644
--- a/ip.go
+++ b/ip.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/ip_test.go b/ip_test.go
index 38c4a1cac..20e3127a8 100644
--- a/ip_test.go
+++ b/ip_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/json.go b/json.go
index 16b2d0577..6da0aaf97 100644
--- a/json.go
+++ b/json.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/json_test.go b/json_test.go
index 8fb9ebc96..0b15ed1a1 100644
--- a/json_test.go
+++ b/json_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/log.go b/log.go
index 3f8de5904..b9ec3d561 100644
--- a/log.go
+++ b/log.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/middleware/basic_auth.go b/middleware/basic_auth.go
index 07a5761b8..7e809f5f7 100644
--- a/middleware/basic_auth.go
+++ b/middleware/basic_auth.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/basic_auth_test.go b/middleware/basic_auth_test.go
index 2e133e071..6e07065bf 100644
--- a/middleware/basic_auth_test.go
+++ b/middleware/basic_auth_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/body_dump.go b/middleware/body_dump.go
index 946ffc58f..e7b20981c 100644
--- a/middleware/body_dump.go
+++ b/middleware/body_dump.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/body_dump_test.go b/middleware/body_dump_test.go
index a68930b49..e880af45b 100644
--- a/middleware/body_dump_test.go
+++ b/middleware/body_dump_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/body_limit.go b/middleware/body_limit.go
index 99e3ac547..81972304e 100644
--- a/middleware/body_limit.go
+++ b/middleware/body_limit.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/body_limit_test.go b/middleware/body_limit_test.go
index 0fd66ee0f..d14c2b649 100644
--- a/middleware/body_limit_test.go
+++ b/middleware/body_limit_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/compress.go b/middleware/compress.go
index c77062d92..681c0346f 100644
--- a/middleware/compress.go
+++ b/middleware/compress.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/compress_test.go b/middleware/compress_test.go
index 6c5ce4123..4bbdfdbc2 100644
--- a/middleware/compress_test.go
+++ b/middleware/compress_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/context_timeout.go b/middleware/context_timeout.go
index 1937693f1..e67173f21 100644
--- a/middleware/context_timeout.go
+++ b/middleware/context_timeout.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/context_timeout_test.go b/middleware/context_timeout_test.go
index 24c6203e7..e69bcd268 100644
--- a/middleware/context_timeout_test.go
+++ b/middleware/context_timeout_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/cors.go b/middleware/cors.go
index 7ace2f224..dd7030e56 100644
--- a/middleware/cors.go
+++ b/middleware/cors.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/cors_test.go b/middleware/cors_test.go
index 797600c5c..64e5c6542 100644
--- a/middleware/cors_test.go
+++ b/middleware/cors_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/csrf.go b/middleware/csrf.go
index adf12210b..015473d9f 100644
--- a/middleware/csrf.go
+++ b/middleware/csrf.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/csrf_test.go b/middleware/csrf_test.go
index 6b20297ee..98e5d04f6 100644
--- a/middleware/csrf_test.go
+++ b/middleware/csrf_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/decompress.go b/middleware/decompress.go
index a73c9738b..3dded53c5 100644
--- a/middleware/decompress.go
+++ b/middleware/decompress.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/decompress_test.go b/middleware/decompress_test.go
index 351e0e708..63b1a68f5 100644
--- a/middleware/decompress_test.go
+++ b/middleware/decompress_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/extractor.go b/middleware/extractor.go
index 5d9cee6d0..3f2741407 100644
--- a/middleware/extractor.go
+++ b/middleware/extractor.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/extractor_test.go b/middleware/extractor_test.go
index 428c5563e..42cbcfeab 100644
--- a/middleware/extractor_test.go
+++ b/middleware/extractor_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/jwt.go b/middleware/jwt.go
index bc318c976..276bdfe39 100644
--- a/middleware/jwt.go
+++ b/middleware/jwt.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build go1.15
 // +build go1.15
 
diff --git a/middleware/jwt_test.go b/middleware/jwt_test.go
index 90e8cad81..bbe4b8808 100644
--- a/middleware/jwt_test.go
+++ b/middleware/jwt_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build go1.15
 // +build go1.15
 
diff --git a/middleware/key_auth.go b/middleware/key_auth.go
index f6fcc5d69..f7ce8c18a 100644
--- a/middleware/key_auth.go
+++ b/middleware/key_auth.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/key_auth_test.go b/middleware/key_auth_test.go
index ff8968c38..447f0bee8 100644
--- a/middleware/key_auth_test.go
+++ b/middleware/key_auth_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/logger.go b/middleware/logger.go
index 7958d873b..43fd59ffc 100644
--- a/middleware/logger.go
+++ b/middleware/logger.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/logger_test.go b/middleware/logger_test.go
index 9f35a70bc..d5236e1ac 100644
--- a/middleware/logger_test.go
+++ b/middleware/logger_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/method_override.go b/middleware/method_override.go
index 92b14d2ed..668a57a41 100644
--- a/middleware/method_override.go
+++ b/middleware/method_override.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/method_override_test.go b/middleware/method_override_test.go
index 5760b1581..0000d1d80 100644
--- a/middleware/method_override_test.go
+++ b/middleware/method_override_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/middleware.go b/middleware/middleware.go
index 664f71f45..8dfb8dda6 100644
--- a/middleware/middleware.go
+++ b/middleware/middleware.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/middleware_test.go b/middleware/middleware_test.go
index 990568d55..7f3dc3866 100644
--- a/middleware/middleware_test.go
+++ b/middleware/middleware_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/proxy.go b/middleware/proxy.go
index 16b00d645..ddf4b7f06 100644
--- a/middleware/proxy.go
+++ b/middleware/proxy.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/proxy_test.go b/middleware/proxy_test.go
index 1c93ba031..e87229ab5 100644
--- a/middleware/proxy_test.go
+++ b/middleware/proxy_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/rate_limiter.go b/middleware/rate_limiter.go
index 1d24df52a..a58b16491 100644
--- a/middleware/rate_limiter.go
+++ b/middleware/rate_limiter.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/rate_limiter_test.go b/middleware/rate_limiter_test.go
index f66961fe2..1de7b63e5 100644
--- a/middleware/rate_limiter_test.go
+++ b/middleware/rate_limiter_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/recover.go b/middleware/recover.go
index 0466cfe56..35f38e72c 100644
--- a/middleware/recover.go
+++ b/middleware/recover.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/recover_test.go b/middleware/recover_test.go
index 3e0d35d79..8fa34fa5c 100644
--- a/middleware/recover_test.go
+++ b/middleware/recover_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/redirect.go b/middleware/redirect.go
index 13877db38..b772ac131 100644
--- a/middleware/redirect.go
+++ b/middleware/redirect.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/redirect_test.go b/middleware/redirect_test.go
index 9d1b56205..88068ea2e 100644
--- a/middleware/redirect_test.go
+++ b/middleware/redirect_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/request_id.go b/middleware/request_id.go
index e29c8f50d..411737cb4 100644
--- a/middleware/request_id.go
+++ b/middleware/request_id.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/request_id_test.go b/middleware/request_id_test.go
index 21b777826..4e68b126a 100644
--- a/middleware/request_id_test.go
+++ b/middleware/request_id_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/request_logger.go b/middleware/request_logger.go
index f82f6b622..7c18200b0 100644
--- a/middleware/request_logger.go
+++ b/middleware/request_logger.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/request_logger_test.go b/middleware/request_logger_test.go
index f3c5f8425..c612f5c22 100644
--- a/middleware/request_logger_test.go
+++ b/middleware/request_logger_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/responsecontroller_1.19.go b/middleware/responsecontroller_1.19.go
index 104784fd0..ddf6b64c0 100644
--- a/middleware/responsecontroller_1.19.go
+++ b/middleware/responsecontroller_1.19.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build !go1.20
 
 package middleware
diff --git a/middleware/responsecontroller_1.20.go b/middleware/responsecontroller_1.20.go
index 02a0cb754..bc03059bc 100644
--- a/middleware/responsecontroller_1.20.go
+++ b/middleware/responsecontroller_1.20.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build go1.20
 
 package middleware
diff --git a/middleware/rewrite.go b/middleware/rewrite.go
index 2090eac04..260dbb1f5 100644
--- a/middleware/rewrite.go
+++ b/middleware/rewrite.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/rewrite_test.go b/middleware/rewrite_test.go
index 47d707c30..d137b2d13 100644
--- a/middleware/rewrite_test.go
+++ b/middleware/rewrite_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/secure.go b/middleware/secure.go
index 6c4051723..b70854ddc 100644
--- a/middleware/secure.go
+++ b/middleware/secure.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/secure_test.go b/middleware/secure_test.go
index 79bd172ae..b579a6d21 100644
--- a/middleware/secure_test.go
+++ b/middleware/secure_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/slash.go b/middleware/slash.go
index a3bf807ec..774cc5582 100644
--- a/middleware/slash.go
+++ b/middleware/slash.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/slash_test.go b/middleware/slash_test.go
index ddb071045..1b365cfea 100644
--- a/middleware/slash_test.go
+++ b/middleware/slash_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/static.go b/middleware/static.go
index 24a5f59b9..15a838175 100644
--- a/middleware/static.go
+++ b/middleware/static.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/static_other.go b/middleware/static_other.go
index 0337b22af..35dbfb38e 100644
--- a/middleware/static_other.go
+++ b/middleware/static_other.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build !windows
 
 package middleware
diff --git a/middleware/static_test.go b/middleware/static_test.go
index f26d97a95..a10ab8000 100644
--- a/middleware/static_test.go
+++ b/middleware/static_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/static_windows.go b/middleware/static_windows.go
index 0ab119859..e294020a1 100644
--- a/middleware/static_windows.go
+++ b/middleware/static_windows.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/timeout.go b/middleware/timeout.go
index 4e8836c85..a47bd4b3b 100644
--- a/middleware/timeout.go
+++ b/middleware/timeout.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/timeout_test.go b/middleware/timeout_test.go
index 98d96baef..e8415d636 100644
--- a/middleware/timeout_test.go
+++ b/middleware/timeout_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/util.go b/middleware/util.go
index 4d2d172fc..09428eb0b 100644
--- a/middleware/util.go
+++ b/middleware/util.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/middleware/util_test.go b/middleware/util_test.go
index d0f20bba6..b54f12627 100644
--- a/middleware/util_test.go
+++ b/middleware/util_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package middleware
 
 import (
diff --git a/response.go b/response.go
index 117881cc6..7ca522eb1 100644
--- a/response.go
+++ b/response.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/response_test.go b/response_test.go
index e457a0193..70cba9776 100644
--- a/response_test.go
+++ b/response_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/responsecontroller_1.19.go b/responsecontroller_1.19.go
index 75c6e3e58..782dab3a3 100644
--- a/responsecontroller_1.19.go
+++ b/responsecontroller_1.19.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build !go1.20
 
 package echo
diff --git a/responsecontroller_1.20.go b/responsecontroller_1.20.go
index fa2fe8b3f..6d77c07f8 100644
--- a/responsecontroller_1.20.go
+++ b/responsecontroller_1.20.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 //go:build go1.20
 
 package echo
diff --git a/router.go b/router.go
index ee6f3fa48..0a9b7d267 100644
--- a/router.go
+++ b/router.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (
diff --git a/router_test.go b/router_test.go
index 619cce092..52d9a0abb 100644
--- a/router_test.go
+++ b/router_test.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
+
 package echo
 
 import (