diff --git a/src/renovate.ts b/src/renovate.ts
index 38111ad5..4596d8b7 100644
--- a/src/renovate.ts
+++ b/src/renovate.ts
@@ -117,7 +117,7 @@ class Renovate {
     }
   }
 
-  private validateDockerCmdFileArgument(): void {
+  private async validateDockerCmdFileArgument(): Promise<void> {
     const dockerCmdFile = this.input.getDockerCmdFile();
     if (dockerCmdFile !== null) {
       if (