diff --git a/pyswagger/__init__.py b/pyswagger/__init__.py
index e8594a9..515da8c 100644
--- a/pyswagger/__init__.py
+++ b/pyswagger/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '0.8.39'
+__version__ = '0.8.39.0001'
 
 from .getter import Getter
 from .core import App, Security
diff --git a/pyswagger/getter.py b/pyswagger/getter.py
index abdc8fb..9f5e329 100644
--- a/pyswagger/getter.py
+++ b/pyswagger/getter.py
@@ -45,7 +45,7 @@ def __next__(self):
                 if obj.startswith('{'):
                     obj = json.loads(obj)
                 else:
-                    obj = yaml.load(obj)
+                    obj = yaml.safe_load(obj)
             except ValueError:
                 raise Exception('Unknown format startswith {0} ...'.format(obj[:10]))
 
diff --git a/pyswagger/io.py b/pyswagger/io.py
index 75569c2..3ffae14 100644
--- a/pyswagger/io.py
+++ b/pyswagger/io.py
@@ -8,6 +8,14 @@
 import collections
 import logging
 
+# Mapping and Mutable Mapping moved to collections.abc in Python 3.10
+try:
+    from collections import abc
+    collections.MutableMapping = abc.MutableMapping
+    collections.Mapping        = abc.Mapping
+except:
+    pass
+
 
 logger = logging.getLogger(__name__)
 
diff --git a/pyswagger/tests/contrib/client/test_flask.py b/pyswagger/tests/contrib/client/test_flask.py
index c96f233..313f624 100644
--- a/pyswagger/tests/contrib/client/test_flask.py
+++ b/pyswagger/tests/contrib/client/test_flask.py
@@ -196,16 +196,18 @@ def test_custom_headers_multiple_values_to_one_key(self):
         headers = [('X-TEST-HEADER', 'aaa'), ('X-TEST-HEADER', 'bbb')]
         resp = self.client.request(
             sapp.op['updatePet'](body=dict(id=1, name='Tom1')),
-            headers=headers
+            headers=headers,
+            opt={'join_headers': False}
         )
-        self.assertEqual(received_headers.get_all('X-TEST-HEADER'), ['bbb'])
+        self.assertEqual(received_headers.get_all('X-TEST-HEADER'), ['aaa, bbb'])
 
+ 
         # with 'join_headers'
         resp = self.client.request(
             sapp.op['updatePet'](body=dict(id=1, name='Tom1')),
             headers=headers,
             opt={'join_headers': True}
         )
-        self.assertEqual(received_headers.get_all('X-TEST-HEADER'), ['aaa,bbb'])
 
+        self.assertEqual(received_headers.get_all('X-TEST-HEADER'), ['aaa,bbb'])
 
diff --git a/pyswagger/utils.py b/pyswagger/utils.py
index 485b245..6bfb1dd 100644
--- a/pyswagger/utils.py
+++ b/pyswagger/utils.py
@@ -9,8 +9,18 @@
 import os
 import operator
 import functools
+
 import collections
 
+# Mapping and Mutable Mapping moved to collections.abc in Python 3.10
+try:
+    from collections import abc
+    collections.MutableMapping = abc.MutableMapping
+    collections.Mapping        = abc.Mapping
+except:
+    pass
+
+
 #TODO: accept varg
 def scope_compose(scope, name, sep=private.SCOPE_SEPARATOR):
     """ compose a new scope
diff --git a/requirements.txt b/requirements.txt
index 8af0466..c03a1d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,9 @@
-six>=1.6.0
-pyaml>=15.03.1
+certifi>=2024.6.2
+charset-normalizer>=3.3.2
+idna>=3.7
+pyaml>=24.4.0
+PyYAML>=6.0.1
+requests>=2.32.3
+six>=1.16.0
+urllib3>=2.2.2
 validate_email>=1.3