diff --git a/src/PdfCreator.ts b/src/PdfCreator.ts
index efd360c..1155da0 100644
--- a/src/PdfCreator.ts
+++ b/src/PdfCreator.ts
@@ -32,6 +32,41 @@ export class PdfCreator {
      * Initializes i18n(ext), Handlebars and puppeteer.
      */
     public async init() {
+        const minimal_args = [
+            '--autoplay-policy=user-gesture-required',
+            '--disable-background-networking',
+            '--disable-background-timer-throttling',
+            '--disable-backgrounding-occluded-windows',
+            '--disable-breakpad',
+            '--disable-client-side-phishing-detection',
+            '--disable-component-update',
+            '--disable-default-apps',
+            '--disable-dev-shm-usage',
+            '--disable-domain-reliability',
+            '--disable-extensions',
+            '--disable-features=AudioServiceOutOfProcess',
+            '--disable-hang-monitor',
+            '--disable-ipc-flooding-protection',
+            '--disable-notifications',
+            '--disable-offer-store-unmasked-wallet-cards',
+            '--disable-popup-blocking',
+            '--disable-print-preview',
+            '--disable-prompt-on-repost',
+            '--disable-renderer-backgrounding',
+            '--disable-speech-api',
+            '--disable-sync',
+            '--hide-scrollbars',
+            '--ignore-gpu-blacklist',
+            '--metrics-recording-only',
+            '--mute-audio',
+            '--no-default-browser-check',
+            '--no-first-run',
+            '--no-pings',
+            '--no-zygote',
+            '--password-store=basic',
+            '--use-gl=swiftshader'
+        ];
+
         await i18next
             .use(Backend)
             .init({
@@ -46,7 +81,7 @@ export class PdfCreator {
                 return i18next.t(str, PdfCreator.interpolations).toString();
             }
         );
-        this.browser = await puppeteer.launch({ headless: true });
+        this.browser = await puppeteer.launch({ headless: true, args: minimal_args });
     }
 
     /**
@@ -58,24 +93,21 @@ export class PdfCreator {
         if (runners.length == 1 && Object.keys(runners[0]).length == 0) {
             runners[0] = this.generateEmptyRunner();
         }
-        if (runners.length > 100) {
+        if (runners.length > 50) {
             let pdf_promises = new Array<Promise<Buffer>>();
             let i, j;
-            for (i = 0, j = runners.length; i < j; i += 100) {
-                let chunk = runners.slice(i, i + 100);
+            for (i = 0, j = runners.length; i < j; i += 50) {
+                let chunk = runners.slice(i, i + 50);
                 pdf_promises.push(this.generateSponsoringContract(chunk, locale));
             }
             const pdfs = await Promise.all(pdf_promises);
             return await this.mergePdfs(pdfs);
         }
-        console.log("triggered")
         await i18next.changeLanguage(locale);
         const template_source = fs.readFileSync(`${this.templateDir}/sponsoring_contract.html`, 'utf8');
         const template = Handlebars.compile(template_source);
         const result = template({ runners })
-        console.log("finished: bars")
         const pdf = await this.renderPdf(result, { format: "A5", landscape: true });
-        console.log("finished: puppet")
         return pdf
     }