diff --git a/cli_support/CLI.py b/cli_support/CLI.py
index f6d0750..5a074cc 100644
--- a/cli_support/CLI.py
+++ b/cli_support/CLI.py
@@ -9,7 +9,7 @@
 
 import sys
 import xml.etree.ElementTree as ET
-from typing import Any, Optional
+from typing import Any, List, Optional
 
 from .cli_assessment_summary import CliAssessmentSummary
 from .cli_copyright import CliCopyright
@@ -65,12 +65,12 @@ def __init__(self) -> None:
         self.general_information = CliGeneralInformation()
         self.assessment_summary = CliAssessmentSummary()
 
-        self.licenses: list[CliLicense] = []
-        self.copyrights: list[CliCopyright] = []
-        self.obligations: list[CliObligation] = []
-        self.tags: list[str] = []
-        self.export_restrictions: list[CliExportRestriction] = []
-        self.external_ids: list[CliExternalId] = []
+        self.licenses: List[CliLicense] = []
+        self.copyrights: List[CliCopyright] = []
+        self.obligations: List[CliObligation] = []
+        self.tags: List[str] = []
+        self.export_restrictions: List[CliExportRestriction] = []
+        self.external_ids: List[CliExternalId] = []
         self.irrelevant_files = CliIrrelevantFiles()
         self.comment: str = ""
 
diff --git a/cli_support/cli_copyright.py b/cli_support/cli_copyright.py
index 02c8e25..fb8acf7 100644
--- a/cli_support/cli_copyright.py
+++ b/cli_support/cli_copyright.py
@@ -8,6 +8,7 @@
 # -------------------------------------------------------------------------------
 
 import xml.etree.ElementTree as ET
+from typing import List
 
 from .cli_file_item_base import CliFileItemBase
 
@@ -20,8 +21,8 @@ class CliCopyright(CliFileItemBase):
     def __init__(self) -> None:
         CliFileItemBase.__init__(self)
         self.text: str = ""
-        self.files: list[str] = []
-        self.hashes: list[str] = []
+        self.files: List[str] = []
+        self.hashes: List[str] = []
 
     def _read_from_element(self, element: ET.Element) -> None:
         """Read copyright from XML element."""
diff --git a/cli_support/cli_file_item_base.py b/cli_support/cli_file_item_base.py
index a9a7615..80b889f 100644
--- a/cli_support/cli_file_item_base.py
+++ b/cli_support/cli_file_item_base.py
@@ -8,6 +8,7 @@
 # -------------------------------------------------------------------------------
 
 import xml.etree.ElementTree as ET
+from typing import List
 
 from .xml_base import XmlBase
 
@@ -19,8 +20,8 @@ class CliFileItemBase(XmlBase):
     FILEHASH_TAG = "FileHash"
 
     def __init__(self) -> None:
-        self.files: list[str] = []
-        self.hashes: list[str] = []
+        self.files: List[str] = []
+        self.hashes: List[str] = []
 
     def _read_files_from_element(self, element: ET.Element) -> None:
         """Read files and hashes from XML element."""
diff --git a/cli_support/cli_irrelevant_files.py b/cli_support/cli_irrelevant_files.py
index eb90c77..d2c092c 100644
--- a/cli_support/cli_irrelevant_files.py
+++ b/cli_support/cli_irrelevant_files.py
@@ -8,6 +8,7 @@
 # -------------------------------------------------------------------------------
 
 import xml.etree.ElementTree as ET
+from typing import List
 
 from .cli_file_item_base import CliFileItemBase
 
@@ -19,8 +20,8 @@ class CliIrrelevantFiles(CliFileItemBase):
 
     def __init__(self) -> None:
         CliFileItemBase.__init__(self)
-        self.files: list[str] = []
-        self.hashes: list[str] = []
+        self.files: List[str] = []
+        self.hashes: List[str] = []
 
     def _read_from_element(self, element: ET.Element) -> None:
         """Read irrelevant files from XML element."""
diff --git a/cli_support/cli_license.py b/cli_support/cli_license.py
index b897c75..efa1176 100644
--- a/cli_support/cli_license.py
+++ b/cli_support/cli_license.py
@@ -8,6 +8,7 @@
 # -------------------------------------------------------------------------------
 
 import xml.etree.ElementTree as ET
+from typing import List
 
 from .cli_file_item_base import CliFileItemBase
 
@@ -25,10 +26,10 @@ def __init__(self) -> None:
         self.type: str = ""
         self.name: str = ""
         self.spdx_identifier: str = ""
-        self.acknowledgements: list[str] = []
-        self.tags: list[str] = []
-        self.files: list[str] = []
-        self.hashes: list[str] = []
+        self.acknowledgements: List[str] = []
+        self.tags: List[str] = []
+        self.files: List[str] = []
+        self.hashes: List[str] = []
 
     def _read_from_element(self, element: ET.Element) -> None:
         """Read license from XML element."""
diff --git a/cli_support/cli_obligation.py b/cli_support/cli_obligation.py
index e4824aa..5a70373 100644
--- a/cli_support/cli_obligation.py
+++ b/cli_support/cli_obligation.py
@@ -8,6 +8,7 @@
 # -------------------------------------------------------------------------------
 
 import xml.etree.ElementTree as ET
+from typing import List
 
 from .xml_base import XmlBase
 
@@ -23,7 +24,7 @@ class CliObligation(XmlBase):
     def __init__(self) -> None:
         self.text: str = ""
         self.topic: str = ""
-        self.licenses: list[str] = []
+        self.licenses: List[str] = []
 
     def _read_from_element(self, element: ET.Element) -> None:
         """Read license from XML element."""
diff --git a/cli_support/license_tools.py b/cli_support/license_tools.py
index 443d714..03493fd 100644
--- a/cli_support/license_tools.py
+++ b/cli_support/license_tools.py
@@ -33,7 +33,7 @@ def get_global_license(clifile: CliFile) -> Optional[CliLicense]:
     @staticmethod
     def get_non_global_licenses(clifile: CliFile) -> List[CliLicense]:
         """Gets the non global licenses."""
-        result: list[CliLicense] = []
+        result: List[CliLicense] = []
         for lic in clifile.licenses:
             if lic.type.upper() != "GLOBAL":
                 result.append(lic)