diff --git a/BiliDriveEx/__init__.py b/BiliDriveEx/__init__.py
index bdeccec4f50b07425387e53d4f39f1d781cac3a2..9e8e89cf40ad0f116b1f7be5e7ef9752a198e294 100644
--- a/BiliDriveEx/__init__.py
+++ b/BiliDriveEx/__init__.py
@@ -7,4 +7,4 @@ https://github.com/apachecn/BiliDriveEx"""
 __author__ = "ApacheCN"
 __email__ = "apachecn@163.com"
 __license__ = "SATA"
-__version__ = "2019.01.22"
+__version__ = "2019.03.06"
diff --git a/BiliDriveEx/encoder.py b/BiliDriveEx/encoder.py
index 9fa02ba175b3380f7f9b7bba9589c4b239cd1e33..5d8252b1b886eff44a8337d2d1c61bd95cf319ff 100644
--- a/BiliDriveEx/encoder.py
+++ b/BiliDriveEx/encoder.py
@@ -50,14 +50,14 @@ class Encoder:
         
         minsz = minw * minh * dep
         if len(data) < minsz:
-            data = data + b'\0' * (minsz - len(data))
+            data += b'\0' * (minsz - len(data))
         
-        rem = len(data) % (minw * dep)
-        if rem != 0:
-            data = data + b'\0' * (minw * dep - rem)
-        hei = len(data) // (minw * dep)
+        side = math.ceil(math.sqrt(len(data) / dep))
+        total = side * side * dep
+        if len(data) < total:
+            data += b'\0' * (total - len(data))
         
-        img = Image.frombytes(mode, (minw, hei), data)
+        img = Image.frombytes(mode, (side, side), data)
         bio = BytesIO()
         img.save(bio, 'png')
         return bio.getvalue()