diff --git a/kitsunekko_tools/common.py b/kitsunekko_tools/common.py
index f35cbd9..1e84863 100644
--- a/kitsunekko_tools/common.py
+++ b/kitsunekko_tools/common.py
@@ -12,7 +12,7 @@ def what(self) -> str:
         raise NotImplementedError()
 
 
-RE_FILENAME_PROHIBITED = re.compile(r"[ _\\\n\t\r#\[\]{}<>^*/:`?]+", flags=re.MULTILINE | re.IGNORECASE)
+RE_FILENAME_PROHIBITED = re.compile(r"[ _\\\n\t\r#\[\]{}<>^*/:`?'|]+", flags=re.MULTILINE | re.IGNORECASE)
 
 
 def fs_name_strip(name: str) -> str: