diff --git a/ts/editor/changeTimer.ts b/ts/editor/changeTimer.ts
index 0b6566c4c..5b7ce8153 100644
--- a/ts/editor/changeTimer.ts
+++ b/ts/editor/changeTimer.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import type { EditingArea } from ".";
 
 import { getCurrentField } from ".";
diff --git a/ts/editor/focusHandlers.ts b/ts/editor/focusHandlers.ts
index df5d0d16b..112c42172 100644
--- a/ts/editor/focusHandlers.ts
+++ b/ts/editor/focusHandlers.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import type { EditingArea, EditorField } from ".";
 
 import { bridgeCommand } from "./lib";
diff --git a/ts/editor/helpers.ts b/ts/editor/helpers.ts
index c2ce1efc1..da7cb5d27 100644
--- a/ts/editor/helpers.ts
+++ b/ts/editor/helpers.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 export function nodeIsElement(node: Node): node is Element {
     return node.nodeType === Node.ELEMENT_NODE;
 }
diff --git a/ts/editor/htmlFilter.ts b/ts/editor/htmlFilter.ts
index bb995cbd9..39a2cad9e 100644
--- a/ts/editor/htmlFilter.ts
+++ b/ts/editor/htmlFilter.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import { nodeIsElement } from "./helpers";
 
 export function filterHTML(
diff --git a/ts/editor/inputHandlers.ts b/ts/editor/inputHandlers.ts
index d60c64165..f153d1968 100644
--- a/ts/editor/inputHandlers.ts
+++ b/ts/editor/inputHandlers.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import { EditingArea } from ".";
 import { nodeIsElement } from "./helpers";
 import { triggerChangeTimer } from "./changeTimer";
diff --git a/ts/editor/lib.ts b/ts/editor/lib.ts
index 3797974c8..63a9b0324 100644
--- a/ts/editor/lib.ts
+++ b/ts/editor/lib.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 declare global {
     interface Window {
         bridgeCommand<T>(command: string, callback?: (value: T) => void): void;
diff --git a/ts/editor/noteId.ts b/ts/editor/noteId.ts
index e787a77d6..649db8d5e 100644
--- a/ts/editor/noteId.ts
+++ b/ts/editor/noteId.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 let currentNoteId: number | null = null;
 
 export function setNoteId(id: number): void {
diff --git a/ts/editor/toolbar.ts b/ts/editor/toolbar.ts
index f0410d78f..95a05896f 100644
--- a/ts/editor/toolbar.ts
+++ b/ts/editor/toolbar.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import { EditingArea } from ".";
 
 export function updateButtonState(): void {
diff --git a/ts/editor/wrap.ts b/ts/editor/wrap.ts
index 2408fe0f5..3c45b731c 100644
--- a/ts/editor/wrap.ts
+++ b/ts/editor/wrap.ts
@@ -1,3 +1,6 @@
+/* Copyright: Ankitects Pty Ltd and contributors
+ * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+
 import { getCurrentField, setFormat } from ".";
 
 function wrappedExceptForWhitespace(text: string, front: string, back: string): string {