diff --git a/gnuplot-4.6.3/post.js b/gnuplot-4.6.3/post.js
index a626915..14632cc 100644
--- a/gnuplot-4.6.3/post.js
+++ b/gnuplot-4.6.3/post.js
@@ -8,10 +8,9 @@ self['FS'] = FS;
 self['FS']['root'] = FS.root;
 self['FS']['deleteFile'] = FS.deleteFile;
 self['FS']['findObject'] = FS.findObject;
-self['FS']['createDataFile'] = FS.createDataFile;
+self['FS']['createFile'] = FS.createFile;
 self['FS']['getFileContents'] = function(name) {
-    var file = FS.findObject(name);
-    if (!file) return null;
-    return file.contents;
+    if (!FS.findObject(name)) return null;
+    return FS.readFile(name);
 };
 
diff --git a/gnuplot-4.6.3/pre.js b/gnuplot-4.6.3/pre.js
index 72306b5..2e477fe 100644
--- a/gnuplot-4.6.3/pre.js
+++ b/gnuplot-4.6.3/pre.js
@@ -30,15 +30,14 @@ self.addEventListener('message', function(e) {
         FS.deleteFile(name);
       var arrc = content;
       if (typeof(content) == "string")
-        arrc = Module['intArrayFromString'](content, true);
-      FS.createDataFile('/', name, arrc);
+        arrc = intArrayFromString(content, true);
+      FS.createFile('/', name, arrc, true, true);
       result['content'] = 'OK';
       self.postMessage(result);
       break;
 
     case 'getFile':
-      var file = FS.findObject(name);
-      result['content'] = file.contents || 0;
+      result['content'] = FS.readFile(name) || 0;
       self.postMessage(result);
       break;