diff --git a/arcor2/VERSION b/arcor2/VERSION
index 2b7c5ae0..17b2ccd9 100644
--- a/arcor2/VERSION
+++ b/arcor2/VERSION
@@ -1 +1 @@
-0.4.2
+0.4.3
diff --git a/arcor2/nodes/build.py b/arcor2/nodes/build.py
index 8b04897b..b8b76350 100755
--- a/arcor2/nodes/build.py
+++ b/arcor2/nodes/build.py
@@ -13,6 +13,7 @@
 from apispec import APISpec  # type: ignore
 from apispec_webframeworks.flask import FlaskPlugin  # type: ignore
 from flask import Flask, send_file
+from flask_cors import CORS  # type: ignore
 from flask_swagger_ui import get_swaggerui_blueprint  # type: ignore
 
 import arcor2
@@ -42,6 +43,7 @@
 )
 
 app = Flask(__name__)
+CORS(app)
 
 
 def _publish(project_id: str):
diff --git a/arcor2/nodes/execution_proxy.py b/arcor2/nodes/execution_proxy.py
index be9ee5bd..8f7fb1ee 100755
--- a/arcor2/nodes/execution_proxy.py
+++ b/arcor2/nodes/execution_proxy.py
@@ -13,6 +13,7 @@
 from apispec import APISpec  # type: ignore
 from apispec_webframeworks.flask import FlaskPlugin  # type: ignore
 from flask import Flask, jsonify, request, send_file
+from flask_cors import CORS  # type: ignore
 from flask_swagger_ui import get_swaggerui_blueprint  # type: ignore
 from werkzeug.utils import secure_filename
 
@@ -34,6 +35,7 @@
 )
 
 app = Flask(__name__)
+CORS(app)
 
 
 # TODO find out why long-lasting connection is not possible (it is getting disconnected after few minutes)
diff --git a/setup.py b/setup.py
index 33d7e87d..e1accce7 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,8 @@
         'flask_swagger_ui',
         'websocket-client',
         'pyyaml',  # dependency of apispec, for some reason not installed automatically...
-        'Pillow'
+        'Pillow',
+        'flask-cors'
     ],
     extras_require={
         'test': [