diff --git a/lib/modules/manager/sbt/extract.ts b/lib/modules/manager/sbt/extract.ts
index b28c82a642e99186aae4ccfb42002ed989ec8c2c..4933298b48ac923d644548dedeff04abb179f22d 100644
--- a/lib/modules/manager/sbt/extract.ts
+++ b/lib/modules/manager/sbt/extract.ts
@@ -396,11 +396,11 @@ export async function extractAllPackageFiles(
     for (const dep of pkg.deps) {
       dep.registryUrls ??= [];
       if (proxyUrls.length > 0) {
-        dep.registryUrls!.unshift(...proxyUrls);
+        dep.registryUrls.unshift(...proxyUrls);
       } else if (dep.depType === 'plugin') {
-        dep.registryUrls!.unshift(SBT_PLUGINS_REPO, SBT_MVN_REPO);
+        dep.registryUrls.unshift(SBT_PLUGINS_REPO, SBT_MVN_REPO);
       } else {
-        dep.registryUrls!.unshift(SBT_MVN_REPO);
+        dep.registryUrls.unshift(SBT_MVN_REPO);
       }
     }
   }