diff --git a/calculator/calculator.py b/calculator/calculator.py
index 1847cd025d41f1aa10997af653ce7495478a506f..a546fb898472a8fd7a8242915ecf341d879bfd4f 100644
--- a/calculator/calculator.py
+++ b/calculator/calculator.py
@@ -2,7 +2,7 @@
 This Calculator holds the logic for the calculator.
 """
 from calculator.operators import Operator, STANDARD_OPERATORS
-from calculator.expression import Token, Term, Expression, TermExpression, OperatorExpression
+from calculator.expression import Term, Expression, TermExpression, OperatorExpression
 
 
 class Calculator:
@@ -18,7 +18,7 @@ class Calculator:
             operators = STANDARD_OPERATORS
         self.operators = operators
 
-    def tokenize(self, line: str) -> list[Token]:
+    def tokenize(self, line: str):
         """
         Tokenize an expression into a list of tokens.
         """
@@ -34,7 +34,7 @@ class Calculator:
                     raise ValueError(f"Invalid token {token}") from exc
         return tokens
 
-    def parse(self, tokens: list[Token]) -> Expression:
+    def parse(self, tokens) -> Expression:
         """
         Parse a list of tokens into an ordered expression.
         """