diff --git a/functions.js b/functions.js
index fa68f74..d44ba02 100644
--- a/functions.js
+++ b/functions.js
@@ -91,7 +91,7 @@ class Seance {
       })
 
       // write metadata to output folder
-      fs.writeFileSync(path.join(outputFolder, 'metadata.json'), metadata)
+      await fs.promises.writeFile(path.join(outputFolder, 'metadata.json'), metadata)
       return post
     };
 
@@ -142,7 +142,7 @@ class Seance {
     console.debug('Loading metadata')
 
     var postMetaFile = path.join(postFolder, 'metadata.json')
-    let postMeta = await JSON.parse(fs.readFileSync(postMetaFile))
+    let postMeta = await JSON.parse(await fs.promises.readFile(postMetaFile))
 
     // Process lines
     const readInterface = readline.createInterface({
@@ -238,7 +238,7 @@ class Seance {
       custom_excerpt: postMeta.subtitle || null,
       tags: postMeta.tags,
       authors: users,
-      html: markdown.toHTML(fs.readFileSync(postOutput, 'utf-8')),
+      html: markdown.toHTML(await fs.promises.readFile(postOutput, 'utf-8')),
       feature_image: featuredImagePath
     }, {source: 'html'})
     .then((res) => {
@@ -271,12 +271,16 @@ class Seance {
       const response = await fetch(mediumUrl)
       text = await response.text()
     } else if (fs.existsSync(mediumUrl)) {
-      text = fs.readFileSync(mediumUrl).toString()
+      text = (await fs.promises.readFile(mediumUrl)).toString()
     } else {
       throw { error: 'URL must be a Medium URL or existing JSON file' }
     }
 
-    json = await JSON.parse(text.substr(text.indexOf('{')))
+    try {
+      json = await JSON.parse(text.substr(text.indexOf('{')))
+    } catch(err) {
+      throw { error: 'You JSON seems to be malformed' }
+    }
 
     return json;
   }
@@ -346,7 +350,7 @@ class Seance {
     console.log(`Fetching: ${imagePath}`)
 
     const response = await (await r2.get(imagePath).response).buffer()
-    await fs.writeFileSync(filePath, response, 'base64')
+    await await fs.promises.writeFile(filePath, response, 'base64')
 
     console.log("Uploading to server")