diff --git a/clearml/backend_api/utils.py b/clearml/backend_api/utils.py
index ab35d473..18e4041d 100644
--- a/clearml/backend_api/utils.py
+++ b/clearml/backend_api/utils.py
@@ -125,7 +125,7 @@ def get_http_session_with_retry(
         session.trust_env = False
 
     if backoff_max is not None:
-        Retry.BACKOFF_MAX = backoff_max
+        Retry.DEFAULT_BACKOFF_MAX = backoff_max
 
     retry = Retry(
         total=total, connect=connect, read=read, redirect=redirect, status=status,
diff --git a/clearml/backend_interface/task/models.py b/clearml/backend_interface/task/models.py
index 6c19e963..ae6283b2 100644
--- a/clearml/backend_interface/task/models.py
+++ b/clearml/backend_interface/task/models.py
@@ -35,7 +35,7 @@ class ModelsList(UserList):
 
 
 class TaskModels(UserDict):
-    _input_models_re = re.compile(pattern=r"((?i)(Using model id: )(\w+)?)", flags=0)
+    _input_models_re = re.compile(pattern=r"((Using model id: )(\w+)?)", flags=re.IGNORECASE)
 
     @property
     def input(self):