diff --git a/MergeSort.py b/MergeSort.py
index d715c89..02df4e3 100644
--- a/MergeSort.py
+++ b/MergeSort.py
@@ -16,7 +16,7 @@ def mergeSort(arr):
   
         i = j = k = 0
        
-        while i < len(L) and j < len(R): 
+        while (i < len(L) and j < len(R)): 
             if L[i] < R[j]: 
                 arr[k] = L[i] 
                 i+=1
@@ -26,12 +26,12 @@ def mergeSort(arr):
             k+=1
           
         
-        while i < len(L): 
+        while (i < len(L)): 
             arr[k] = L[i] 
             i+=1
             k+=1
           
-        while j < len(R): 
+        while (j < len(R)): 
             arr[k] = R[j] 
             j+=1
             k+=1