diff --git a/setup.py b/setup.py
index c65f1fa04..32f3267a2 100755
--- a/setup.py
+++ b/setup.py
@@ -79,7 +79,7 @@
         ]
     },
     install_requires=[
-        "numpy >= 1.14.5",
+        "numpy >= 1.14.5, < 2.0.0",
         "protobuf >= 3.1.0, <= 4.0.0",
         "sympy",
         "tqdm",