diff --git a/components/IscnUploadForm.vue b/components/IscnUploadForm.vue
index 5f211519..7467870c 100644
--- a/components/IscnUploadForm.vue
+++ b/components/IscnUploadForm.vue
@@ -836,40 +836,38 @@ export default class IscnUploadForm extends Vue {
     if (this.epubMetadataList?.find(epubMetadata => epubMetadata.thumbnailArweaveId)) {
       return;
     }
-    // eslint-disable-next-line no-restricted-syntax
-    for (const file of this.fileRecords) {
-      if (IMAGE_MIME_TYPES.includes(file.fileType)) {
-        const existingData =
-          this.sentArweaveTransactionInfo.get(file.ipfsHash) || {}
-        if (existingData.arweaveId) {
-          this.epubMetadataList.push({
-            thumbnailIpfsHash: file.ipfsHash,
-            thumbnailArweaveId: existingData.arweaveId,
-          })
-          return
-        }
-        let {transactionHash} = existingData;
-        if (!transactionHash) {
-          // eslint-disable-next-line no-await-in-loop
-          transactionHash = await this.sendArweaveFeeTx(file);
-        }
-        // eslint-disable-next-line no-await-in-loop
-        const arweaveId = await this.uploadFileAndGetArweaveId(
-          file,
-          transactionHash,
-        )
 
-        if (arweaveId) {
-          this.epubMetadataList.push({
-            thumbnailIpfsHash: file.ipfsHash,
-            thumbnailArweaveId: arweaveId,
-          })
-          this.sentArweaveTransactionInfo.set(file.ipfsHash, { transactionHash, arweaveId });
-          return
-        }
-        return
+    const uploadPromises = this.fileRecords
+    .filter(file => IMAGE_MIME_TYPES.includes(file.fileType))
+    .map(async (file) => {
+      const existingData = this.sentArweaveTransactionInfo.get(file.ipfsHash) || {};
+
+      if (existingData.arweaveId) {
+        return {
+          thumbnailIpfsHash: file.ipfsHash,
+          thumbnailArweaveId: existingData.arweaveId,
+        };
       }
-    }
+
+      let { transactionHash } = existingData;
+      if (!transactionHash) {
+        transactionHash = await this.sendArweaveFeeTx(file);
+      }
+
+      const arweaveId = await this.uploadFileAndGetArweaveId(file, transactionHash);
+
+      if (arweaveId) {
+        this.sentArweaveTransactionInfo.set(file.ipfsHash, { transactionHash, arweaveId });
+        return {
+          thumbnailIpfsHash: file.ipfsHash,
+          thumbnailArweaveId: arweaveId,
+        };
+      }
+
+      return false
+    });
+    const results = await Promise.all(uploadPromises);
+    this.epubMetadataList.push(...results.filter(Boolean));
   }
 
   async onSubmit() {