diff --git a/CAB.mak b/CAB.mak
index 16cdf51..6effd42 100644
Binary files a/CAB.mak and b/CAB.mak differ
diff --git a/Core/Makefile b/Core/Makefile
index 4c71572..cccd7dd 100644
Binary files a/Core/Makefile and b/Core/Makefile differ
diff --git a/IDT.js b/IDT.js
index 65f82bc..18e0087 100644
--- a/IDT.js
+++ b/IDT.js
@@ -1,21 +1,7 @@
 /*
+    ​​​​SPDX-License-Identifier: GPL-3.0-or-later
     Copyright © 1991-2021 Amebis
     Copyright © 2016 GÉANT
-
-    This file is part of MSIBuild.
-
-    MSIBuild is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    MSIBuild is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with MSIBuild. If not, see <http://www.gnu.org/licenses/>.
 */
 
 /*@cc_on @*/
diff --git a/MSI.js b/MSI.js
index 363b0af..d5df060 100644
--- a/MSI.js
+++ b/MSI.js
@@ -1,21 +1,7 @@
 /*
+    ​​​​SPDX-License-Identifier: GPL-3.0-or-later
     Copyright © 1991-2021 Amebis
     Copyright © 2016 GÉANT
-
-    This file is part of MSIBuild.
-
-    MSIBuild is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    MSIBuild is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with MSIBuild. If not, see <http://www.gnu.org/licenses/>.
 */
 
 /*@cc_on @*/
diff --git a/MSI.wsf b/MSI.wsf
index 93b7c41..d18243e 100644
--- a/MSI.wsf
+++ b/MSI.wsf
@@ -1,22 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
+    ​​​​SPDX-License-Identifier: GPL-3.0-or-later
     Copyright © 1991-2021 Amebis
     Copyright © 2016 GÉANT
-
-    This file is part of MSIBuild.
-
-    MSIBuild is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    MSIBuild is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with MSIBuild. If not, see <http://www.gnu.org/licenses/>.
 -->
 <package>
 	<job id="MakeDDF">
diff --git a/MSM.mak b/MSM.mak
index edc746f..c7e84ea 100644
Binary files a/MSM.mak and b/MSM.mak differ
diff --git a/Makefile b/Makefile
index 06355a8..742e734 100644
Binary files a/Makefile and b/Makefile differ
diff --git a/PO.js b/PO.js
index d016b66..40ebb2d 100644
--- a/PO.js
+++ b/PO.js
@@ -1,21 +1,7 @@
 /*
+    ​​​​SPDX-License-Identifier: GPL-3.0-or-later
     Copyright © 1991-2021 Amebis
     Copyright © 2016 GÉANT
-
-    This file is part of MSIBuild.
-
-    MSIBuild is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    MSIBuild is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with MSIBuild. If not, see <http://www.gnu.org/licenses/>.
 */
 
 /*@cc_on @*/
diff --git a/String.js b/String.js
index 6444baa..a3e826b 100644
--- a/String.js
+++ b/String.js
@@ -1,21 +1,7 @@
 /*
+    ​​​​SPDX-License-Identifier: GPL-3.0-or-later
     Copyright © 1991-2021 Amebis
     Copyright © 2016 GÉANT
-
-    This file is part of MSIBuild.
-
-    MSIBuild is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    MSIBuild is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with MSIBuild. If not, see <http://www.gnu.org/licenses/>.
 */
 
 /*@cc_on @*/
diff --git a/UI/Makefile b/UI/Makefile
index f066cc5..1346ef7 100644
Binary files a/UI/Makefile and b/UI/Makefile differ
diff --git a/Version/Makefile b/Version/Makefile
index 4590f7e..da142fd 100644
Binary files a/Version/Makefile and b/Version/Makefile differ