diff --git a/Chapter 12/Exercise_12.1.html b/Chapter 12/Exercise_12.1.html
index b9cbed7..200d21e 100644
--- a/Chapter 12/Exercise_12.1.html	
+++ b/Chapter 12/Exercise_12.1.html	
@@ -14,7 +14,7 @@
     <br>
     <button>Replace</button>
     <script>
-        const output = document.getElementById("output")
+        const output = document.getElementById("output");
         const findValue = document.getElementById("sText");
         const replaceValue = document.getElementById("rText");
         document.querySelector("button").addEventListener("click", lookUp);