diff --git a/tools/cpp_examples/bert-gpu-serving/paddle-gpu-serving/setup.py b/tools/cpp_examples/bert-gpu-serving/paddle-gpu-serving/setup.py
index 35ed9e12ce70cd8a53b38a301eb86c67ca9a999d..7e3b46bbaa8b023a2e5e5ea3ccd28fec3207d7f0 100644
--- a/tools/cpp_examples/bert-gpu-serving/paddle-gpu-serving/setup.py
+++ b/tools/cpp_examples/bert-gpu-serving/paddle-gpu-serving/setup.py
@@ -23,7 +23,7 @@ info_content = open(info_py, 'r').readlines()
 version_line = [
     l.strip() for l in info_content if l.startswith('__version__')
 ][0]
-exec(version_line)  # produce __version__
+exec (version_line)  # produce __version__
 
 setuptools.setup(
     name="paddle-gpu-serving",