diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ba46d9b..43539cc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,4 +25,4 @@ repos:
     rev: v3.20.0
     hooks:
       - id: pyupgrade
-        args: [--py3-only]
+        args: [--py310-plus]
diff --git a/debtcollector/_utils.py b/debtcollector/_utils.py
index cdc3119..61c7ad0 100644
--- a/debtcollector/_utils.py
+++ b/debtcollector/_utils.py
@@ -99,7 +99,7 @@ def get_class_name(obj, fully_qualified=True):
             return obj.__name__
 
     if fully_qualified and hasattr(obj, '__module__'):
-        return '{}.{}'.format(obj.__module__, obj.__name__)
+        return f'{obj.__module__}.{obj.__name__}'
     else:
         return obj.__name__