diff --git a/samples/server/petstore/flaskConnexion-python2/requirements.txt b/samples/server/petstore/flaskConnexion-python2/requirements.txt
index 38bbf3e74cb5..19b78ffc36da 100644
--- a/samples/server/petstore/flaskConnexion-python2/requirements.txt
+++ b/samples/server/petstore/flaskConnexion-python2/requirements.txt
@@ -1,4 +1,4 @@
-connexion == 1.0.129
+connexion == 1.1.9
 python_dateutil == 2.6.0
 typing == 3.5.2.2
 setuptools >= 21.0.0
diff --git a/samples/server/petstore/flaskConnexion-python2/swagger_server/encoder.py b/samples/server/petstore/flaskConnexion-python2/swagger_server/encoder.py
index 90988e4d3eaa..3ff8cad5d729 100644
--- a/samples/server/petstore/flaskConnexion-python2/swagger_server/encoder.py
+++ b/samples/server/petstore/flaskConnexion-python2/swagger_server/encoder.py
@@ -1,9 +1,8 @@
-from connexion.decorators import produces
 from six import iteritems
 from swagger_server.models.base_model_ import Model
+from connexion.apps.flask_app import FlaskJSONEncoder
 
-
-class JSONEncoder(produces.JSONEncoder):
+class JSONEncoder(FlaskJSONEncoder):
     include_nulls = False
 
     def default(self, o):
@@ -16,4 +15,4 @@ class JSONEncoder(produces.JSONEncoder):
                 attr = o.attribute_map[attr]
                 dikt[attr] = value
             return dikt
-        return produces.JSONEncoder.default(self, o)
\ No newline at end of file
+        return FlaskJSONEncoder.default(self, o)
\ No newline at end of file
diff --git a/samples/server/petstore/flaskConnexion/swagger_server/encoder.py b/samples/server/petstore/flaskConnexion/swagger_server/encoder.py
index 90988e4d3eaa..3ff8cad5d729 100644
--- a/samples/server/petstore/flaskConnexion/swagger_server/encoder.py
+++ b/samples/server/petstore/flaskConnexion/swagger_server/encoder.py
@@ -1,9 +1,8 @@
-from connexion.decorators import produces
 from six import iteritems
 from swagger_server.models.base_model_ import Model
+from connexion.apps.flask_app import FlaskJSONEncoder
 
-
-class JSONEncoder(produces.JSONEncoder):
+class JSONEncoder(FlaskJSONEncoder):
     include_nulls = False
 
     def default(self, o):
@@ -16,4 +15,4 @@ class JSONEncoder(produces.JSONEncoder):
                 attr = o.attribute_map[attr]
                 dikt[attr] = value
             return dikt
-        return produces.JSONEncoder.default(self, o)
\ No newline at end of file
+        return FlaskJSONEncoder.default(self, o)
\ No newline at end of file