diff --git a/src/Mod/Cloud/App/AppCloud.cpp b/src/Mod/Cloud/App/AppCloud.cpp
index 55ed2cdc7e..0b7a98689c 100644
--- a/src/Mod/Cloud/App/AppCloud.cpp
+++ b/src/Mod/Cloud/App/AppCloud.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun         jmverdun3@gmail.com      *
  *                                                                         *
diff --git a/src/Mod/Cloud/App/AppCloud.h b/src/Mod/Cloud/App/AppCloud.h
index b8be72202a..d629b43437 100644
--- a/src/Mod/Cloud/App/AppCloud.h
+++ b/src/Mod/Cloud/App/AppCloud.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun         jmverdun3@gmail.com      *
  *                                                                         *
diff --git a/src/Mod/Cloud/App/CMakeLists.txt b/src/Mod/Cloud/App/CMakeLists.txt
index 6819da6891..f515dc1e96 100644
--- a/src/Mod/Cloud/App/CMakeLists.txt
+++ b/src/Mod/Cloud/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 if (APPLE)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPENSSL_CFLAGS}")
 endif()
diff --git a/src/Mod/Cloud/App/PreCompiled.h b/src/Mod/Cloud/App/PreCompiled.h
index 73a65a5d93..ef7a851177 100644
--- a/src/Mod/Cloud/App/PreCompiled.h
+++ b/src/Mod/Cloud/App/PreCompiled.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun        jmverdun3@gmail.com       *
  *                                                                         *
diff --git a/src/Mod/Cloud/CMakeLists.txt b/src/Mod/Cloud/CMakeLists.txt
index e8d5b89bcb..300beaca2e 100644
--- a/src/Mod/Cloud/CMakeLists.txt
+++ b/src/Mod/Cloud/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 #----------------------------- Control certificate validation ------------
 option(ALLOW_SELF_SIGNED_CERTIFICATE "Allow self signed certificate" OFF)
 if (ALLOW_SELF_SIGNED_CERTIFICATE)
diff --git a/src/Mod/Cloud/CloudGlobal.h b/src/Mod/Cloud/CloudGlobal.h
index caaf18d77e..56dd19c36b 100644
--- a/src/Mod/Cloud/CloudGlobal.h
+++ b/src/Mod/Cloud/CloudGlobal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
  *                                                                         *
diff --git a/src/Mod/Cloud/Gui/AppCloudGui.cpp b/src/Mod/Cloud/Gui/AppCloudGui.cpp
index 10c14a59fd..8096972409 100644
--- a/src/Mod/Cloud/Gui/AppCloudGui.cpp
+++ b/src/Mod/Cloud/Gui/AppCloudGui.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME         <Your e-mail address>            *
  *                                                                         *
diff --git a/src/Mod/Cloud/Gui/CMakeLists.txt b/src/Mod/Cloud/Gui/CMakeLists.txt
index 73907c8152..8ade7700a0 100644
--- a/src/Mod/Cloud/Gui/CMakeLists.txt
+++ b/src/Mod/Cloud/Gui/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 include_directories(
     ${CMAKE_SOURCE_DIR}/src
diff --git a/src/Mod/Cloud/Gui/Command.cpp b/src/Mod/Cloud/Gui/Command.cpp
index 787e2927ed..3d1c88f9ea 100644
--- a/src/Mod/Cloud/Gui/Command.cpp
+++ b/src/Mod/Cloud/Gui/Command.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun        jmverdun3@gmail.com       *
  *                                                                         *
diff --git a/src/Mod/Cloud/Gui/PreCompiled.h b/src/Mod/Cloud/Gui/PreCompiled.h
index eccac6c52a..84be05f500 100644
--- a/src/Mod/Cloud/Gui/PreCompiled.h
+++ b/src/Mod/Cloud/Gui/PreCompiled.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun        jmverdun3@gmail.com       *
  *                                                                         *
diff --git a/src/Mod/Cloud/Gui/Workbench.cpp b/src/Mod/Cloud/Gui/Workbench.cpp
index 073d8f417a..ef6b558390 100644
--- a/src/Mod/Cloud/Gui/Workbench.cpp
+++ b/src/Mod/Cloud/Gui/Workbench.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun        jmverdun3@gmail.com       *
  *                                                                         *
diff --git a/src/Mod/Cloud/Gui/Workbench.h b/src/Mod/Cloud/Gui/Workbench.h
index 63976d8bcd..96b7fd44f4 100644
--- a/src/Mod/Cloud/Gui/Workbench.h
+++ b/src/Mod/Cloud/Gui/Workbench.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /***************************************************************************
  *   Copyright (c) 2019 Jean-Marie Verdun        jmverdun3@gmail.com       *
  *                                                                         *
diff --git a/src/Mod/Cloud/Init.py b/src/Mod/Cloud/Init.py
index ccfc9a0da4..cc5782a9f1 100644
--- a/src/Mod/Cloud/Init.py
+++ b/src/Mod/Cloud/Init.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # FreeCAD init script of the Cloud module
 # (c) 2001 Juergen Riegel LGPL
 # (c) 2019 Jean-Marie Verdun LGPL
diff --git a/src/Mod/Cloud/InitGui.py b/src/Mod/Cloud/InitGui.py
index fc3cb9f527..532c186e0b 100644
--- a/src/Mod/Cloud/InitGui.py
+++ b/src/Mod/Cloud/InitGui.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # Cloud gui init module
 # (c) 2001 Juergen Riegel LGPL
 # (c) 2019 Jean-Marie Verdun LGPL