diff --git a/dynamic_stack_decider/dynamic_stack_decider/dsd.py b/dynamic_stack_decider/dynamic_stack_decider/dsd.py
index 870194f..b4743b6 100644
--- a/dynamic_stack_decider/dynamic_stack_decider/dsd.py
+++ b/dynamic_stack_decider/dynamic_stack_decider/dsd.py
@@ -5,7 +5,7 @@
 import sys
 import traceback
 from pathlib import Path
-from typing import Dict, List, Optional, Tuple
+from typing import Optional
 
 from rclpy.node import Node
 from rclpy.qos import DurabilityPolicy, QoSProfile
@@ -26,7 +26,7 @@
 )
 
 
-def discover_elements(path: str) -> Dict[str, AbstractStackElement]:
+def discover_elements(path: str) -> dict[str, AbstractStackElement]:
     """
     Extract all the classes from the files in the given path and return a dictionary containing them
 
@@ -122,10 +122,10 @@ def __init__(self, blackboard, debug_topic: str = None, node: Optional[Node] = N
         self.tree: Optional[Tree] = None
         # The stack is implemented as a list of tuples consisting of the tree element
         # and the actual module instance
-        self.stack: List[Tuple[AbstractTreeElement, AbstractStackElement]] = []
+        self.stack: list[tuple[AbstractTreeElement, AbstractStackElement]] = []
 
-        self.actions: Dict[str, AbstractActionElement] = {}
-        self.decisions: Dict[str, AbstractDecisionElement] = {}
+        self.actions: dict[str, AbstractActionElement] = {}
+        self.decisions: dict[str, AbstractDecisionElement] = {}
 
         # Check if debugging is active
         self.debug_active = debug_topic is not None
diff --git a/dynamic_stack_decider/dynamic_stack_decider/parser.py b/dynamic_stack_decider/dynamic_stack_decider/parser.py
index 9b0c18a..bddd4c4 100644
--- a/dynamic_stack_decider/dynamic_stack_decider/parser.py
+++ b/dynamic_stack_decider/dynamic_stack_decider/parser.py
@@ -242,7 +242,7 @@ def _create_sequence_element(self, actions, parent, lnr):
         Create a new sequence element
 
         :param actions: The names of actions in the sequence
-        :type actions: List[str]
+        :type actions: list[str]
         :param parent: The parent element of the sequence
         :type parent: AbstractDecisionElement
         :param lnr: Line number of the current line (used for error messages)