diff --git a/tfjs-converter/python/requirements.txt b/tfjs-converter/python/requirements.txt
index 735e24a41ff..e5d75b6d071 100644
--- a/tfjs-converter/python/requirements.txt
+++ b/tfjs-converter/python/requirements.txt
@@ -1,6 +1,6 @@
 h5py>=2.8.0
-numpy>=1.16.4
+numpy>=1.16.4,<1.19.0
 six>=1.12.0
-tensorflow-cpu>=2.1.0<3
+tensorflow-cpu>=2.1.0,<3
 tensorflow-hub==0.7.0
 PyInquirer==1.0.3