diff --git a/u6/matching_brackets.py b/u6/matching_brackets.py
index b561d4d..9b5a450 100644
--- a/u6/matching_brackets.py
+++ b/u6/matching_brackets.py
@@ -2,7 +2,7 @@ def is_paired(input_string):
     stack = []
 
     for char in input_string:
-        if char == '(' or char == '[]' or char == '{':
+        if char == '(' or char == '[' or char == '{':
             stack.append(char)
 
         elif char == ')':