diff --git a/calc.html b/calc.html
index dbdd14b6ec73938cf9768802db5d60db82bc1f86..7861c5724b65cf0b18eed6c6b271b5f1ac262855 100644
--- a/calc.html
+++ b/calc.html
@@ -269,7 +269,7 @@
     </div>
     <div id="help-overlay-container" class="overlay">
       <div id="help-overlay-content">
-	<h3 id="help-title" style="text-align: center">RPN calculator v1.0.0</h3>
+	<h3 id="help-title" style="text-align: center">RPN calculator v1.1.0</h3>
 	<h4>About</h4>
 	<p>RPN calculator is a web implementation of a <a href="#TODO">reverse polish notation calculator</a>. You push numbers to stack first, then press operator keys which will pop number from stack and run the calculation. For example, you may press num1, return, num2, num3, return, plus, and you will see result 24 in top of stack. Number is pushed to stack using return key.</p>
 	<p>Supported operators are: +, -, *, /, square-root, power, sum-all. Utility features include delete number, duplicate number, swap top 2 number on stack, undo, clear stack. Hover over button to see what that button does and the hotkey for that button.</p>
@@ -294,7 +294,7 @@
 	  const testing = false;
 	  const uiTesting = false;
 	  const aboutPageTesting = false;
-	  const enableServiceWorker = false;
+	  const enableServiceWorker = true;
 
 	  // service worker
 	  if ('serviceWorker' in navigator && enableServiceWorker) {