diff --git a/doc/SupportedSigmaFieldModifiers.md b/doc/SupportedSigmaFieldModifiers.md
index ff2e6e6ec..0031ae44d 100644
--- a/doc/SupportedSigmaFieldModifiers.md
+++ b/doc/SupportedSigmaFieldModifiers.md
@@ -36,5 +36,6 @@
 | utf16ǀbase64offsetǀcontains   |             0 |                0 |
 | wideǀbase64offsetǀcontains    |             0 |                0 |
 
-Updated: 2024/10/15  
+This document is being dynamically updated based on the latest rules.
+Last Update: 2024/10/16
 Author: Fukusuke Takahashi
\ No newline at end of file
diff --git a/scripts/supported_modifiers_check/supported-modifier.py b/scripts/supported_modifiers_check/supported-modifier.py
index 04b82e789..1ca47e927 100644
--- a/scripts/supported_modifiers_check/supported-modifier.py
+++ b/scripts/supported_modifiers_check/supported-modifier.py
@@ -90,14 +90,15 @@ def get_yml_detection_counts(dir_path: str) -> Counter:
     markdown_str = markdown_str + pd.DataFrame(sorted(result_supported), columns=header).to_markdown(index=False)
     markdown_str = markdown_str + "\n\n# Hayabusa unsupported field modifiers\n"
     markdown_str = markdown_str + pd.DataFrame(sorted(result_unsupported), columns=header).to_markdown(index=False)
+    markdown_str = markdown_str + "\n\nThis document is being dynamically updated based on the latest rules."
     current_markdown = Path(args.out_path)
     if current_markdown.exists():
         current_str = current_markdown.read_text(encoding='utf-8')
-        current_str = re.sub(r"This document is being dynamically updated based on the latest rules. Last Update:.*", "", current_str, flags=re.DOTALL).strip()
+        current_str = re.sub(r"Last Update:.*", "", current_str, flags=re.DOTALL).strip()
         if current_str == markdown_str.strip():
             logging.info("No changes detected in the report. Skipping file write.")
         else:
-            markdown_str = f"{markdown_str}\n\nUpdated: {datetime.datetime.now().strftime('%Y/%m/%d')}  \nAuthor: Fukusuke Takahashi"
+            markdown_str = f"{markdown_str}\nLast Update: {datetime.datetime.now().strftime('%Y/%m/%d')}\nAuthor: Fukusuke Takahashi"
             Path(args.out_path).write_text(markdown_str)
             logging.info(f'Markdown report generated and saved to {args.out_path}')
     end_time = time.time()