diff --git a/zoomeye/__init__.py b/zoomeye/__init__.py
index 9689819..ad86a13 100644
--- a/zoomeye/__init__.py
+++ b/zoomeye/__init__.py
@@ -11,5 +11,5 @@
 
 __name__ = 'zoomeye'
 __package__ = 'zoomeye'
-__version__ = ' 2.0.4.4'
+__version__ = ' 2.0.4.5'
 __site__ = "https://www.zoomeye.org/doc"
diff --git a/zoomeye/show.py b/zoomeye/show.py
index 08b31f6..fb60960 100644
--- a/zoomeye/show.py
+++ b/zoomeye/show.py
@@ -34,15 +34,15 @@ def convert_str(s):
     d = {
         '\n': '\\n',
         '\r': '\\r',
-        '\t': '\\t'
+        '\t': '\\t',
+        '\b': '\\b',
+        '\a': '\\a',
     }
     for c in s:
-        if ord(c) > 0xff or ord(c) in range(32, 127):
-            res.append(c)
-        elif c in d.keys():
+        if c in d.keys():
             res.append(d[c])
         else:
-            res.append('\\x%.2x' % ord(c))
+            res.append(c)
     return ''.join(res)