diff --git a/.circleci/config.yml b/.circleci/config.yml
index 804b7d6c..5bbd1bf8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 jobs:
   build:
     macos:
-      xcode: "9.3.0"
+      xcode: "9.4.0"
 
     steps:
       - checkout
@@ -14,6 +14,11 @@ jobs:
             sudo systemsetup -settimezone Europe/Warsaw
             echo "Today is $(date +"%Y-%m-%d %T")"
 
+      - run:
+          name: Installed python version
+          command: |
+            python -V
+
 #      - restore_cache:
 #          name: Restore Yarn Package Cache
 #          keys:
@@ -24,7 +29,7 @@ jobs:
           name: Install project
           # there is an issue with yarn and cache during executed on CI; for now we just run it twice, second should
           # be successful. Check it later if updates fixed the issue
-          
+
           # increased timeout is for material-design-icons
           command: |
             yarn install --network-timeout 1000000
diff --git a/package.json b/package.json
index 92d13e68..dcc07cec 100644
--- a/package.json
+++ b/package.json
@@ -10,10 +10,10 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
-    "startforelectron": "ng serve -e electronDev",
+    "startforelectron": "ng serve --configuration=electronDev",
     "build": "ng build",
-    "buildforelectron": "ng build -e electronProd",
-    "buildforgithub": "ng build -e githubProd",
+    "buildforelectron": "ng build --configuration=electronProd",
+    "buildforgithub": "ng build --configuration=githubProd",
     "test": "ng test",
     "lint": "ng lint",
     "e2e": "ng e2e",