diff --git a/src/config.ts b/src/config.ts
index 7dbc3c0..ed07fd0 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -13,7 +13,7 @@ export const config = {
     sponor_logos: getSponsorLogos(),
     api_key: getApiKey(),
     disclaimer_text: process.env.DISCLAIMER_TEXT || "",
-    contracts_per_runner: process.env.CONTRACTS_PER_RUNNER || 1,
+    contracts_per_runner: parseInt(process.env.CONTRACTS_PER_RUNNER) || 1,
 }
 let errors = 0
 if (typeof config.internal_port !== "number") {