diff --git a/README.md b/README.md
index d47cd4e..bd33e7c 100644
--- a/README.md
+++ b/README.md
@@ -4,22 +4,24 @@ This is a node script extracting E-Books from Amazon Kindle Cloud Reader.
 Useful e.g. for being able to read on devices where the Cloud Reader doesn't work and for having a copy in an open format.
 Works with Chrome/Chromium. Other browsers use different formats for the WebSQL file where the E-Books are stored for offline use.
 
-Code is from this gists:
+Antecedents:
 
- * 1: https://gist.github.com/yangchenyun/a1c123935d82f5e25d57
- * 2: https://gist.github.com/moodule/84140e557065ac3d73f669f120429ae1
+1. https://gist.github.com/yangchenyun/a1c123935d82f5e25d57
+2. https://gist.github.com/moodule/84140e557065ac3d73f669f120429ae1
+3. https://github.com/d10r/kindle-fetch
 
-I have just added minor usability improvements (e.g. cmdline switch for input file selection) and a package.json file.
+`d10r` added minor usability improvements (e.g. cmdline switch for input file selection) and a package.json file.
+
+I have just updated it to cope with newer versions of Node.
 
 ## Usage
 
-This was successfully tested with nodejs v6 and v8 (will print ugly warnings with v8).    
-Doesn't work for me with nodejs v10 (and reportedly also not with v11).
+This was successfully tested with Node v13.
 
-<pre>
+```
 npm install
 ./main.js --help
-</pre>
+```
 
 This generates HTML files with the book content in the directory you're in.
 
diff --git a/main.js b/main.js
index b2699d4..ba904eb 100755
--- a/main.js
+++ b/main.js
@@ -289,8 +289,10 @@ db.all("select metadata from 'bookinfo'", function(err, rows) {
         //var HtmlFile = path.join(os.tmpdir(), title.replace(/\s+/g, '-') + '.html');
         var HtmlFile = title.replace(/\s+/g, '-') + '.html';
 
-        fs.writeFile(HtmlFile, HtmlHeader);
-        console.log("created the file with HTML headers.");
+        fs.writeFile(HtmlFile, HtmlHeader, (err) => {
+            if (err) throw err;
+            console.log("created the file with HTML headers.");
+        });
 
         db.all("select id, piece, other from 'fragments' where asin='" + asin + "' order by id", function(err, rows) {
             rows.forEach(function (row) {
@@ -309,11 +311,15 @@ db.all("select metadata from 'bookinfo'", function(err, rows) {
                         'dataUrl="' + image + '"',
                         'src="' + imageDataMap[image] + '"');
                 }
-                fs.appendFile(HtmlFile, uncompressedFragmentData);
+                fs.appendFile(HtmlFile, uncompressedFragmentData, (err) => {
+                    if (err) throw err;
+                });
             });
         });
 
-        fs.appendFile(HtmlFile, '</body></html>');
-        console.log("created the file at: " + HtmlFile);
+        fs.appendFile(HtmlFile, '</body></html>', (err) =>{
+            if (err) throw err;
+            console.log("created the file at: " + HtmlFile);
+        });
     });
 });
diff --git a/package.json b/package.json
index 0d39fd7..a0b9047 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,6 @@
     "main": "main.js",
     "dependencies": {
         "osenv": "^0.1.4",
-        "sqlite3": "^3.1.8"
+        "sqlite3": "^4.1.1"
     }
 }