diff --git a/config.nims b/config.nims
index 7c9db32..066f260 100644
--- a/config.nims
+++ b/config.nims
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 # begin Nimble config (version 1)
 when fileExists("nimble.paths"):
   include "nimble.paths"
diff --git a/json_rpc.nimble b/json_rpc.nimble
index b8a9f4f..8709d61 100644
--- a/json_rpc.nimble
+++ b/json_rpc.nimble
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 mode = ScriptMode.Verbose
 
 packageName   = "json_rpc"
diff --git a/json_rpc/client.nim b/json_rpc/client.nim
index ed6cb30..804a228 100644
--- a/json_rpc/client.nim
+++ b/json_rpc/client.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/[tables, macros],
   chronos,
diff --git a/json_rpc/clients/httpclient.nim b/json_rpc/clients/httpclient.nim
index c202d66..be9f810 100644
--- a/json_rpc/clients/httpclient.nim
+++ b/json_rpc/clients/httpclient.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/[tables, uri],
   stew/[byteutils, results],
diff --git a/json_rpc/clients/socketclient.nim b/json_rpc/clients/socketclient.nim
index 77dc643..1ad5c7e 100644
--- a/json_rpc/clients/socketclient.nim
+++ b/json_rpc/clients/socketclient.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/tables,
   chronos,
diff --git a/json_rpc/clients/websocketclient.nim b/json_rpc/clients/websocketclient.nim
index c5bfe54..2d95960 100644
--- a/json_rpc/clients/websocketclient.nim
+++ b/json_rpc/clients/websocketclient.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   ./websocketclientimpl,
   ../client
diff --git a/json_rpc/clients/websocketclientimpl.nim b/json_rpc/clients/websocketclientimpl.nim
index 568b934..3d61d29 100644
--- a/json_rpc/clients/websocketclientimpl.nim
+++ b/json_rpc/clients/websocketclientimpl.nim
@@ -1,9 +1,18 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/[uri, strutils],
   pkg/websock/[websock, extensions/compression/deflate],
   pkg/[chronos, chronos/apps/http/httptable, chronicles],
   stew/byteutils
-  
+
 # avoid clash between Json.encode and Base64Pad.encode
 import ../client except encode
 
diff --git a/json_rpc/errors.nim b/json_rpc/errors.nim
index e09940d..63eb0ee 100644
--- a/json_rpc/errors.nim
+++ b/json_rpc/errors.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 type
   JsonRpcError* = object of CatchableError
     ## Base type of all nim-json-rpc errors
diff --git a/json_rpc/jsonmarshal.nim b/json_rpc/jsonmarshal.nim
index 3685850..f30ec33 100644
--- a/json_rpc/jsonmarshal.nim
+++ b/json_rpc/jsonmarshal.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/[macros, json, typetraits],
   stew/[byteutils, objects],
diff --git a/json_rpc/router.nim b/json_rpc/router.nim
index 42fab15..f6ebf59 100644
--- a/json_rpc/router.nim
+++ b/json_rpc/router.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/[macros, strutils, tables],
   chronicles, chronos, json_serialization/writer,
diff --git a/json_rpc/rpcclient.nim b/json_rpc/rpcclient.nim
index 5b1de04..ac17f15 100644
--- a/json_rpc/rpcclient.nim
+++ b/json_rpc/rpcclient.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import client
 import clients/[socketclient, httpclient, websocketclient]
 export client, socketclient, httpclient, websocketclient
diff --git a/json_rpc/rpcproxy.nim b/json_rpc/rpcproxy.nim
index 12395d7..5ceeb2e 100644
--- a/json_rpc/rpcproxy.nim
+++ b/json_rpc/rpcproxy.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 {.push raises: [Defect].}
 
 import
diff --git a/json_rpc/rpcsecureserver.nim b/json_rpc/rpcsecureserver.nim
index dde4a63..0be17b7 100644
--- a/json_rpc/rpcsecureserver.nim
+++ b/json_rpc/rpcsecureserver.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import server
 import servers/[socketserver, shttpserver]
 export server, socketserver, shttpserver
\ No newline at end of file
diff --git a/json_rpc/rpcserver.nim b/json_rpc/rpcserver.nim
index 1f9e27d..f3405f7 100644
--- a/json_rpc/rpcserver.nim
+++ b/json_rpc/rpcserver.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import server
 import servers/[socketserver, httpserver, websocketserver]
 export server, socketserver, httpserver, websocketserver
diff --git a/json_rpc/server.nim b/json_rpc/server.nim
index fa25a87..22b739d 100644
--- a/json_rpc/server.nim
+++ b/json_rpc/server.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   std/tables,
   chronos,
diff --git a/json_rpc/servers/httpserver.nim b/json_rpc/servers/httpserver.nim
index cdc81cf..f5dd3b0 100644
--- a/json_rpc/servers/httpserver.nim
+++ b/json_rpc/servers/httpserver.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   stew/byteutils,
   chronicles, httputils, chronos,
diff --git a/json_rpc/servers/socketserver.nim b/json_rpc/servers/socketserver.nim
index 6a651b7..4b80c89 100644
--- a/json_rpc/servers/socketserver.nim
+++ b/json_rpc/servers/socketserver.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   chronicles,
   json_serialization/std/net,
diff --git a/json_rpc/servers/websocketserver.nim b/json_rpc/servers/websocketserver.nim
index 8ba5d7e..91e22a0 100644
--- a/json_rpc/servers/websocketserver.nim
+++ b/json_rpc/servers/websocketserver.nim
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 import
   chronicles, chronos, websock/[websock, types],
   websock/extensions/compression/deflate,
diff --git a/nim.cfg b/nim.cfg
index 371f6d7..9a2b184 100644
--- a/nim.cfg
+++ b/nim.cfg
@@ -1,3 +1,12 @@
+# json-rpc
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
 # Avoid some rare stack corruption while using exceptions with a SEH-enabled
 # toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
 @if windows and not vcc: