diff --git a/cagebreak.c b/cagebreak.c
index 28e363f..e7edb4a 100644
--- a/cagebreak.c
+++ b/cagebreak.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _DEFAULT_SOURCE
 
diff --git a/config.h.in b/config.h.in
index a79a80c..35dd0a6 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_CONFIG_H
 #define CG_CONFIG_H
diff --git a/example_scripts/cb_script_header.sh b/example_scripts/cb_script_header.sh
index 9533beb..770f075 100644
--- a/example_scripts/cb_script_header.sh
+++ b/example_scripts/cb_script_header.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Copyright 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 
 named_pipe_send="$(mktemp -u)"
 named_pipe_recv="$(mktemp -u)"
diff --git a/example_scripts/focus_follows_cursor.sh b/example_scripts/focus_follows_cursor.sh
index 79e2889..e47bf88 100644
--- a/example_scripts/focus_follows_cursor.sh
+++ b/example_scripts/focus_follows_cursor.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Copyright 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 
 # This script uses the cagebreak socket to modify the compositor's behaviour in
 # such a way that the currently focussed tile follows the cursor, i.e. that the
diff --git a/example_scripts/show_workspace_views.sh b/example_scripts/show_workspace_views.sh
index 3be9cbb..b5a42ae 100644
--- a/example_scripts/show_workspace_views.sh
+++ b/example_scripts/show_workspace_views.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Copyright 2020 - 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 
 # This script displays the process names of the views on the current workspace.
 
diff --git a/examples/config b/examples/config
index d79a792..6708e42 100644
--- a/examples/config
+++ b/examples/config
@@ -1,5 +1,5 @@
 # Copyright 2020 - 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 ######################
 # General settings an key bindings
 ######################
diff --git a/fuzz/execl_override.c b/fuzz/execl_override.c
index 9fc9e6e..308bd73 100644
--- a/fuzz/execl_override.c
+++ b/fuzz/execl_override.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 // This file is used by the fuzzer in order to prevent executing shell commands.
 
 #define _GNU_SOURCE
diff --git a/fuzz/fuzz-lib.c b/fuzz/fuzz-lib.c
index c159538..5211e05 100644
--- a/fuzz/fuzz-lib.c
+++ b/fuzz/fuzz-lib.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200812L
 
diff --git a/fuzz/fuzz-lib.h b/fuzz/fuzz-lib.h
index 950f455..9254ced 100644
--- a/fuzz/fuzz-lib.h
+++ b/fuzz/fuzz-lib.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_FUZZ_LIB_H
 #define CG_FUZZ_LIB_H
diff --git a/fuzz/fuzz-parse.c b/fuzz/fuzz-parse.c
index 0fc060c..b0cb125 100644
--- a/fuzz/fuzz-parse.c
+++ b/fuzz/fuzz-parse.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200812L
 
diff --git a/fuzz/meson.build b/fuzz/meson.build
index 01fdd3e..f1c08ac 100644
--- a/fuzz/meson.build
+++ b/fuzz/meson.build
@@ -1,5 +1,5 @@
 # Copyright 2020 - 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 
 fuzz_sources = [
   'fuzz-parse.c', 
diff --git a/idle_inhibit_v1.c b/idle_inhibit_v1.c
index 9bc3f7a..b4f91f9 100644
--- a/idle_inhibit_v1.c
+++ b/idle_inhibit_v1.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include <wayland-server-core.h>
 #include <wlr/types/wlr_idle.h>
diff --git a/idle_inhibit_v1.h b/idle_inhibit_v1.h
index f0dce64..74ae956 100644
--- a/idle_inhibit_v1.h
+++ b/idle_inhibit_v1.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 #ifndef CG_IDLE_INHIBIT_H
 #define CG_IDLE_INHIBIT_H
 
diff --git a/input.h b/input.h
index f7877c5..f45e735 100644
--- a/input.h
+++ b/input.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef _CG_INPUT_H
 #define _CG_INPUT_H
diff --git a/input_manager.c b/input_manager.c
index 83cb966..cfde2c9 100644
--- a/input_manager.c
+++ b/input_manager.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200812L
 
diff --git a/input_manager.h b/input_manager.h
index 86dcf2e..b3eb006 100644
--- a/input_manager.h
+++ b/input_manager.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_INPUT_MANAGER_H
 #define CG_INPUT_MANAGER_H
diff --git a/ipc_server.c b/ipc_server.c
index c28979d..ced183a 100644
--- a/ipc_server.c
+++ b/ipc_server.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _DEFAULT_SOURCE
 
diff --git a/ipc_server.h b/ipc_server.h
index 2c66b83..41d7b88 100644
--- a/ipc_server.h
+++ b/ipc_server.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_IPC_SERVER_H
 #define CG_IPC_SERVER_H
diff --git a/keybinding.c b/keybinding.c
index c2f29bb..fa37619 100644
--- a/keybinding.c
+++ b/keybinding.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/keybinding.h b/keybinding.h
index c11de23..ba96c3d 100644
--- a/keybinding.h
+++ b/keybinding.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef KEYBINDING_H
 
diff --git a/libinput.c b/libinput.c
index dcb9d1f..e980060 100644
--- a/libinput.c
+++ b/libinput.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include "input.h"
 #include "input_manager.h"
diff --git a/meson.build b/meson.build
index 0f0f289..a40f08f 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 # Copyright 2020 - 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 project(
   'cagebreak',
   'c',
diff --git a/meson_options.txt b/meson_options.txt
index 6d4a787..b7fc956 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,5 +1,5 @@
 # Copyright 2020 - 2023, project-repo and the cagebreak contributors
-# SPDX -License-Identifier: MIT
+# SPDX-License-Identifier: MIT
 option('xwayland', type: 'boolean', value: 'false', description: 'Enable support for X11 applications')
 option('man-pages', type: 'boolean', value: 'false', description: 'Build man pages (requires pandoc)')
 option('fuzz', type: 'boolean', value: 'false', description: 'Enable building fuzzer targets')
diff --git a/message.c b/message.c
index f0c2c64..74b1d0a 100644
--- a/message.c
+++ b/message.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include <cairo/cairo.h>
 #include <drm_fourcc.h>
diff --git a/message.h b/message.h
index 25bf692..806307c 100644
--- a/message.h
+++ b/message.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef MESSAGE_H
 
diff --git a/output.c b/output.c
index a75f532..b8fc627 100644
--- a/output.c
+++ b/output.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/output.h b/output.h
index 0a255df..90cd615 100644
--- a/output.h
+++ b/output.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_OUTPUT_H
 #define CG_OUTPUT_H
diff --git a/pango.c b/pango.c
index c513f97..3af6f7f 100644
--- a/pango.c
+++ b/pango.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include <cairo.h>
 #include <cairo/cairo.h>
diff --git a/pango.h b/pango.h
index 30f2865..53a78cc 100644
--- a/pango.h
+++ b/pango.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef _SWAY_PANGO_H
 #define _SWAY_PANGO_H
diff --git a/parse.c b/parse.c
index d250439..93fdbf4 100644
--- a/parse.c
+++ b/parse.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200812L
 
diff --git a/parse.h b/parse.h
index 4e38ea9..2949315 100644
--- a/parse.h
+++ b/parse.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef PARSE_H
 
diff --git a/seat.c b/seat.c
index a3e09a0..f75ff62 100644
--- a/seat.c
+++ b/seat.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200812L
 
diff --git a/seat.h b/seat.h
index e44d808..74f4092 100644
--- a/seat.h
+++ b/seat.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_SEAT_H
 #define CG_SEAT_H
diff --git a/server.c b/server.c
index 292d0b0..c50f528 100644
--- a/server.c
+++ b/server.c
@@ -1,11 +1,5 @@
-/*
- * Cagebreak: A Wayland tiling compositor.
- *
- * Copyright (C) 2020-2022 The Cagebreak Authors
- * Copyright (C) 2018-2019 Jente Hidskes
- *
- * See the LICENSE file accompanying this file.
- */
+// Copyright 2020 - 2023, project-repo and the cagebreak contributors
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/server.h b/server.h
index 39d26f4..3c13c4e 100644
--- a/server.h
+++ b/server.h
@@ -1,3 +1,6 @@
+// Copyright 2020 - 2023, project-repo and the cagebreak contributors
+// SPDX-License-Identifier: MIT
+
 #ifndef CG_SERVER_H
 #define CG_SERVER_H
 
diff --git a/util.c b/util.c
index 455f306..f8c7a82 100644
--- a/util.c
+++ b/util.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include <wlr/util/box.h>
 
diff --git a/util.h b/util.h
index ef3f532..b509a00 100644
--- a/util.h
+++ b/util.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_UTIL_H
 #define CG_UTIL_H
diff --git a/view.c b/view.c
index 74c31b8..99e2e7c 100644
--- a/view.c
+++ b/view.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/view.h b/view.h
index 99e3e65..b3b2ed6 100644
--- a/view.h
+++ b/view.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_VIEW_H
 #define CG_VIEW_H
diff --git a/workspace.c b/workspace.c
index 1caff0d..3f84c6f 100644
--- a/workspace.c
+++ b/workspace.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/workspace.h b/workspace.h
index e0f2473..b669cec 100644
--- a/workspace.h
+++ b/workspace.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_WORKSPACE_H
 #define CG_WORKSPACE_H
diff --git a/xdg_shell.c b/xdg_shell.c
index fc251c7..164ede0 100644
--- a/xdg_shell.c
+++ b/xdg_shell.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #define _POSIX_C_SOURCE 200809L
 
diff --git a/xdg_shell.h b/xdg_shell.h
index e066208..fd80b99 100644
--- a/xdg_shell.h
+++ b/xdg_shell.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_XDG_SHELL_H
 #define CG_XDG_SHELL_H
diff --git a/xwayland.c b/xwayland.c
index f601a0f..fd8d174 100644
--- a/xwayland.c
+++ b/xwayland.c
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #include "config.h"
 
diff --git a/xwayland.h b/xwayland.h
index cde30c5..71a0b7a 100644
--- a/xwayland.h
+++ b/xwayland.h
@@ -1,5 +1,5 @@
 // Copyright 2020 - 2023, project-repo and the cagebreak contributors
-// SPDX -License-Identifier: MIT
+// SPDX-License-Identifier: MIT
 
 #ifndef CG_XWAYLAND_H
 #define CG_XWAYLAND_H