diff --git a/Commonly Asked Interview Problems/Trapping Rain Water.java b/Commonly Asked Interview Problems/Trapping Rain Water.java
index d1b498a..f83cf46 100644
--- a/Commonly Asked Interview Problems/Trapping Rain Water.java	
+++ b/Commonly Asked Interview Problems/Trapping Rain Water.java	
@@ -9,7 +9,7 @@
              In this case, 6 units of rain water (blue section) are being trapped.
 */
 class Solution {
-    public int trap(int[] height) {
+    public int trap(int[] height)throws IOException {
         int n = height.length;
         int water = 0;
         int[] l = new int[n];