diff --git a/src/common/InputHandler.ts b/src/common/InputHandler.ts
index 423f4976..1e61a7cb 100644
--- a/src/common/InputHandler.ts
+++ b/src/common/InputHandler.ts
@@ -1969,7 +1969,7 @@ export class InputHandler extends Disposable implements IInputHandler {
         case 2004: // bracketed paste mode (https://cirw.in/blog/bracketed-paste)
           this._coreService.decPrivateModes.bracketedPasteMode = true;
           break;
-        case 2026: // synchronized output (https://github.com/contour-terminal/vt-extensions/blob/main/synchronized-output.md)
+        case 2026: // synchronized output (https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md)
           this._coreService.decPrivateModes.synchronizedOutput = true;
           break;
       }
@@ -2200,7 +2200,7 @@ export class InputHandler extends Disposable implements IInputHandler {
         case 2004: // bracketed paste mode (https://cirw.in/blog/bracketed-paste)
           this._coreService.decPrivateModes.bracketedPasteMode = false;
           break;
-        case 2026: // synchronized output (https://github.com/contour-terminal/vt-extensions/blob/main/synchronized-output.md)
+        case 2026: // synchronized output (https://github.com/contour-terminal/vt-extensions/blob/master/synchronized-output.md)
           this._coreService.decPrivateModes.synchronizedOutput = false;
           this._onRequestRefreshRows.fire(undefined);
           break;