diff --git a/src/PdfCreator.ts b/src/PdfCreator.ts
index 31fbeb7..549cf4f 100644
--- a/src/PdfCreator.ts
+++ b/src/PdfCreator.ts
@@ -22,6 +22,7 @@ export class PdfCreator {
     private templateDir = path.join(__dirname, '/templates');
     private browser;
     private static interpolations = { eventname: config.eventname, sponsoring_receipt_minimum_amount: config.sponsoring_receipt_minimum_amount, currency_symbol: config.currency_symbol }
+    private static contractsPerRunner = config.contracts_per_runner;
 
     /**
      * Main constructor.
diff --git a/src/config.ts b/src/config.ts
index d6e2565..7dbc3c0 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -13,11 +13,15 @@ export const config = {
     sponor_logos: getSponsorLogos(),
     api_key: getApiKey(),
     disclaimer_text: process.env.DISCLAIMER_TEXT || "",
+    contracts_per_runner: process.env.CONTRACTS_PER_RUNNER || 1,
 }
 let errors = 0
 if (typeof config.internal_port !== "number") {
     errors++
 }
+if (typeof config.contracts_per_runner !== "number") {
+    errors++
+}
 if (typeof config.development !== "boolean") {
     errors++
 }