diff --git a/files/ZAZBarCode_v0.2.1.oxt b/files/ZAZBarCode_v0.2.1.oxt
index 18049d6..e438544 100644
Binary files a/files/ZAZBarCode_v0.2.1.oxt and b/files/ZAZBarCode_v0.2.1.oxt differ
diff --git a/source/pythonpath/qrcode/util.py b/source/pythonpath/qrcode/util.py
index 1877884..74ab39f 100644
--- a/source/pythonpath/qrcode/util.py
+++ b/source/pythonpath/qrcode/util.py
@@ -351,7 +351,7 @@ def optimal_data_chunks(data, minimum=4):
     """
     data = to_bytestring(data)
     num_pattern = r'\d'.encode("latin-1")
-    alpha_pattern = '[').encode("latin-1") + re.escape(ALPHA_NUM) + ']'.encode("latin-1")
+    alpha_pattern = '['.encode("latin-1") + re.escape(ALPHA_NUM) + ']'.encode("latin-1")
     if len(data) <= minimum:
         num_pattern = re.compile('^'.encode("latin-1") + num_pattern + '+$'.encode("latin-1"))
         alpha_pattern = re.compile('^'.encode("latin-1") + alpha_pattern + '+$'.encode("latin-1"))