diff --git a/scripts/doc_parsing_utils.py b/scripts/doc_parsing_utils.py
index 857d808aa..79f2e9ec0 100644
--- a/scripts/doc_parsing_utils.py
+++ b/scripts/doc_parsing_utils.py
@@ -1,5 +1,5 @@
 import re
-from typing import TypedDict
+from typing import TypedDict, Union
 
 CODE_INCLUDE_RE = re.compile(r"^\{\*\s*(\S+)\s*(.*)\*\}$")
 CODE_INCLUDE_PLACEHOLDER = "<CODE_INCLUDE>"
@@ -50,8 +50,8 @@ class MarkdownLinkInfo(TypedDict):
     line_no: int
     url: str
     text: str
-    title: str | None
-    attributes: str | None
+    title: Union[str, None]
+    attributes: Union[str, None]
     full_match: str
 
 
@@ -285,7 +285,11 @@ def _add_lang_code_to_url(url: str, lang_code: str) -> str:
 
 
 def _construct_markdown_link(
-    url: str, text: str, title: str | None, attributes: str | None, lang_code: str
+    url: str,
+    text: str,
+    title: Union[str, None],
+    attributes: Union[str, None],
+    lang_code: str,
 ) -> str:
     """
     Construct a markdown link, adjusting the URL for the given language code if needed.
@@ -545,7 +549,7 @@ def extract_multiline_code_blocks(text: list[str]) -> list[MultilineCodeBlockInf
     return blocks
 
 
-def _split_hash_comment(line: str) -> tuple[str, str | None]:
+def _split_hash_comment(line: str) -> tuple[str, Union[str, None]]:
     match = HASH_COMMENT_RE.match(line)
     if match:
         code = match.group("code").rstrip()
@@ -554,7 +558,7 @@ def _split_hash_comment(line: str) -> tuple[str, str | None]:
     return line.rstrip(), None
 
 
-def _split_slashes_comment(line: str) -> tuple[str, str | None]:
+def _split_slashes_comment(line: str) -> tuple[str, Union[str, None]]:
     match = SLASHES_COMMENT_RE.match(line)
     if match:
         code = match.group("code").rstrip()
@@ -600,8 +604,8 @@ def replace_multiline_code_block(
 
     code_block: list[str] = []
     for line_a, line_b in zip(block_a["content"], block_b["content"]):
-        line_a_comment: str | None = None
-        line_b_comment: str | None = None
+        line_a_comment: Union[str, None] = None
+        line_b_comment: Union[str, None] = None
 
         # Handle comments based on language
         if block_language in {