diff --git a/setup.py b/setup.py
index 30d2b3748..15c1df8fd 100644
--- a/setup.py
+++ b/setup.py
@@ -81,7 +81,7 @@ def run(self):
     author='onnx@microsoft.com',
     author_email='onnx@microsoft.com',
     url='https://github.com/onnx/tensorflow-onnx',
-    install_requires=['numpy>=1.14.1', 'onnx>=1.4.1', 'requests', 'six', 'flatbuffers'],
+    install_requires=['numpy>=1.14.1', 'onnx>=1.4.1', 'requests', 'six', 'flatbuffers~=1.12'],
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',