diff --git a/formats/acknowledgement.py b/formats/acknowledgement.py
index 944f15e5088318d2662bc32a9f4f06703d749f5d..23d1c9a05a0a21fc5644044477a64161d12aa636 100644
--- a/formats/acknowledgement.py
+++ b/formats/acknowledgement.py
@@ -7,7 +7,7 @@
 
 
 acknowledgement_schema = {
-    "allOf": [{"$ref": "#/definitions/Message"}],
+    "allOf": [{"$ref": "#/components/schemas/Message"}],
     "type": "object",
     "properties": {
         "acknowledged_message_ID": {
diff --git a/formats/mission_plan.py b/formats/mission_plan.py
index 5cb530590c4676476f143b5029428d6b5d8eb29a..0e6c975c7b2318ab5bcd6478a2e36c89296446c8 100644
--- a/formats/mission_plan.py
+++ b/formats/mission_plan.py
@@ -63,7 +63,7 @@ action_schema = {
 }
 
 mission_plan_schema = {
-    "allOf": [{"$ref": "#/definitions/Message"}],
+    "allOf": [{"$ref": "#/components/schemas/Message"}],
     "type": "object",
     "properties": {
         "autonomy_engine_plan_ID": {
diff --git a/formats/observation.py b/formats/observation.py
index a5a251be4e7aab060d44f927926086965f7876e3..d67ff3839eea5ab7a884a6e99ca48294c4cf3f03 100644
--- a/formats/observation.py
+++ b/formats/observation.py
@@ -30,7 +30,7 @@ hits_schema = {
 }
 
 observation_schema = {
-    "allOf": [{"$ref": "#/definitions/Message"}],
+    "allOf": [{"$ref": "#/components/schemas/Message"}],
     "type": "object",
     "properties": {
         "platform_ID": {
diff --git a/formats/planning_configuration.py b/formats/planning_configuration.py
index 2050dbfda82b6759236efe003c94b726b90020de..50da1848b9611622c6a4bdb216db689d652855af 100644
--- a/formats/planning_configuration.py
+++ b/formats/planning_configuration.py
@@ -157,7 +157,7 @@ squad_metadata_schema = {
 }
 
 planning_configuration_schema = {
-    "allOf": [{"$ref": "#/definitions/Message"}],
+    "allOf": [{"$ref": "#/components/schemas/Message"}],
     "type": "object",
     "properties": {
         "planning_config_ID": {
diff --git a/formats/platform_status.py b/formats/platform_status.py
index f54b4c3b76e189d72d4a8bfe8e43198cecd44c8f..87853c67f443394775becf2b9083226cd10151e9 100644
--- a/formats/platform_status.py
+++ b/formats/platform_status.py
@@ -26,7 +26,7 @@ sensor_schema = {
 }
 
 platform_status_message_schema = {
-    "allOf": [{"$ref": "#/definitions/Message"}],
+    "allOf": [{"$ref": "#/components/schemas/Message"}],
     "type": "object",
     "properties": {
         "platform_ID": {
diff --git a/generate_swagger.py b/generate_swagger.py
index c75f674d5a45d5ab31d10d691fd2d57004e7bc62..29e3b436a42ace841b2fb9569d92b21a497f6bd8 100644
--- a/generate_swagger.py
+++ b/generate_swagger.py
@@ -7,14 +7,12 @@ from formats.acknowledgement import acknowledgement_schema
 
 from flasgger import Swagger
 from flask import Flask
-# from openapi_schema_validator import validate
-from openapi_spec_validator import validate_spec_url
 
 app = Flask(__name__)
 
 swagger_config = {
     "headers": [],
-    "openapi": "3.1",
+    "openapi": "3.0.2",
     "swagger_ui": True,
     "specs_route": "/",
     "info": {
@@ -30,13 +28,15 @@ swagger_config = {
             "model_filter": lambda tag: True,
         }
     ],
-    "definitions": {
-        "Message": message_wrapper_schema,
-        "MissionPlan": mission_plan_schema,
-        "Observation": observation_schema,
-        "PlanningConfiguration": planning_configuration_schema,
-        "PlatformStatus": platform_status_message_schema,
-        "Acknowledgement": acknowledgement_schema,
+    "components": {
+        "schemas": {
+            "Message": message_wrapper_schema,
+            "MissionPlan": mission_plan_schema,
+            "Observation": observation_schema,
+            "PlanningConfiguration": planning_configuration_schema,
+            "PlatformStatus": platform_status_message_schema,
+            "Acknowledgement": acknowledgement_schema,
+        }
     },
     "paths": {
         "/all_messages": {
@@ -49,14 +49,26 @@ swagger_config = {
                             "application/json": {
                                 "schema": {
                                     "oneOf": [
-                                        {"$ref": "#/definitions/Acknowledgement"},
-                                        {"$ref": "#/definitions/PlatformStatus"},
-                                        {"$ref": "#/definitions/MissionPlan"},
-                                        {"$ref": "#/definitions/Observation"},
                                         {
-                                            "$ref": "#/definitions/PlanningConfiguration"
+                                            "$ref": "#/components/schemas/"
+                                            + "Acknowledgement"
+                                        },
+                                        {
+                                            "$ref": "#/components/schemas/"
+                                            + "MissionPlan"
+                                        },
+                                        {
+                                            "$ref": "#/components/schemas/"
+                                            + "Observation"
+                                        },
+                                        {
+                                            "$ref": "#/components/schemas/"
+                                            + "PlanningConfiguration"
+                                        },
+                                        {
+                                            "$ref": "#/components/schemas/"
+                                            + "PlatformStatus"
                                         },
-                                        {"$ref": "#/definitions/PlatformStatus"},
                                     ],
                                     "discriminator": {
                                         "propertyName": "message_type",
@@ -92,7 +104,7 @@ for item in message_types:
                             "schema": {
                                 "allOf": [
                                     {
-                                        "$ref": "#/definitions/" + item,
+                                        "$ref": "#/components/schemas/" + item,
                                     },
                                 ],
                                 "discriminator": {
@@ -108,23 +120,14 @@ for item in message_types:
 
 swag = Swagger(app, config=swagger_config, merge=True)
 
-# validate({"acknowledged_message_ID": "string-type-id", "status": "c2_received"}, acknowledgement_schema)
 
-
-# app.add_url_rule(
-#     '/coordinates',
-#     view_func=Coordinates.as_view('coordinates'),
-#     methods=['GET']
-# )
-
-from openapi_spec_validator import validate_spec, openapi_v3_spec_validator
 if __name__ == "__main__":
     app.run(debug=True)
     # print(validate_spec_url("http://127.0.0.1:5000/swagger.json"))
-    
-    # If no exception is raised by validate_spec(), the spec is valid.
+
+    # # If no exception is raised by validate_spec(), the spec is valid.
     # validate_spec(swagger_config)
     # print("000 Schema validation passed")
 
     # errors_iterator = openapi_v3_spec_validator.iter_errors(swagger_config)
-    # print(errors_iterator)
\ No newline at end of file
+    # print(errors_iterator)