diff --git a/composer.json b/composer.json
index 8353bf9a3..c22a5ac6a 100644
--- a/composer.json
+++ b/composer.json
@@ -23,6 +23,10 @@
     "type": "project",
     "require": {
         "php": ">=5.6",
+
+        "ext-mbstring": "*",
+        "ext-pdo_mysql": "*",
+
         "aluguest/ical-easy-reader": "^1.5",
         "danielstjules/stringy": "^3.1",
         "ezyang/htmlpurifier": "^4.8",
@@ -41,6 +45,9 @@
         "symfony/translation": "^3.3",
         "symfony/var-dumper": "^3.3"
     },
+    "require-dev": {
+        "friendsofphp/php-cs-fixer": "^2.10"
+    },
     "autoload": {
         "psr-4": {
             "": "src/"
diff --git a/package.json b/package.json
index 6869a5ee9..50b33a104 100644
--- a/package.json
+++ b/package.json
@@ -86,7 +86,7 @@
     },
     "scripts": {
         "gulp": "gulp",
-        "release-OSM": "yarn run develop-OSM && gulp release",
+        "release-OSM": "yarn run develop-OSM && php composer.phar install --no-dev && gulp release",
         "develop-OSM": "yarn install && yarn run install-OSM && yarn run assets-OSM",
         "install-OSM": "php composer.phar update",
         "assets-OSM": "yarn upgrade && yarn run build-OSM",