diff --git a/sopel/config/types.py b/sopel/config/types.py
index 2abb5fda6c..3d4ed33f3d 100644
--- a/sopel/config/types.py
+++ b/sopel/config/types.py
@@ -31,7 +31,7 @@
 import re
 import sys
 
-from sopel.tools import get_input
+from sopel.tools import deprecated, get_input
 
 if sys.version_info.major >= 3:
     unicode = str
@@ -264,6 +264,11 @@ def __delete__(self, instance):
         instance._parser.remove_option(instance._section_name, self.name)
 
 
+@deprecated(
+    reason="Use BooleanAttribute instead of ValidatedAttribute with bool as parser",
+    version='7.1',
+    removed_in='9.0',
+)
 def _parse_boolean(value):
     if value is True or value == 1:
         return value
@@ -272,6 +277,11 @@ def _parse_boolean(value):
     return bool(value)
 
 
+@deprecated(
+    reason="Use BooleanAttribute instead of ValidatedAttribute with bool as parser",
+    version='7.1',
+    removed_in='9.0',
+)
 def _serialize_boolean(value):
     return 'true' if _parse_boolean(value) else 'false'