diff --git a/src/nft-minter.ts b/src/nft-minter.ts
index 0283b71..3d5af4f 100644
--- a/src/nft-minter.ts
+++ b/src/nft-minter.ts
@@ -187,6 +187,7 @@ export class NftMinter extends Minter {
 
     // deep validate all mandatory URLs
     try {
+      await checkUrlIsUp(dataPreviewUrl, [200]);
       await checkUrlIsUp(dataMarshalUrl + '/health-check', [200]);
     } catch (error) {
       throw error;
diff --git a/src/sft-minter.ts b/src/sft-minter.ts
index 8b78948..d12b9d1 100644
--- a/src/sft-minter.ts
+++ b/src/sft-minter.ts
@@ -292,6 +292,7 @@ export class SftMinter extends Minter {
 
     // deep validate all mandatory URLs
     try {
+      await checkUrlIsUp(dataPreviewUrl, [200]);
       await checkUrlIsUp(dataMarshalUrl + '/health-check', [200]);
     } catch (error) {
       throw error;