diff --git a/src/Terminal.ts b/src/Terminal.ts
index 7e3b9a2d..38235ee2 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -694,7 +694,7 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
     this.viewportElement.appendChild(this.viewportScrollArea);
 
     // preload audio
-    this.preloadBellSound()
+    this.preloadBellSound();
 
     // Create the selection container.
     this.selectionContainer = document.createElement('div');
@@ -2284,15 +2284,15 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
   }
 
   private visualBell(): boolean {
-    var styles = [].concat.apply([], [this.options.bellStyle]);
+    let styles = [].concat.apply([], [this.options.bellStyle]);
 
-    return styles.indexOf('visual') > -1 || styles.indexOf('both') > -1
+    return styles.indexOf('visual') > -1 || styles.indexOf('both') > -1;
   }
 
   private soundBell(): boolean {
-    var styles = [].concat.apply([], [this.options.bellStyle]);
+    let styles = [].concat.apply([], [this.options.bellStyle]);
 
-    return styles.indexOf('sound') > -1 || styles.indexOf('both') > -1
+    return styles.indexOf('sound') > -1 || styles.indexOf('both') > -1;
   }
 
   private preloadBellSound(): void {