diff --git a/ci/requirements_dev.txt b/ci/requirements_dev.txt
index 83ee30b52071d..66e8dcfa8eda8 100644
--- a/ci/requirements_dev.txt
+++ b/ci/requirements_dev.txt
@@ -1,7 +1,7 @@
 # This file was autogenerated by scripts/convert_deps.py
 # Do not modify directly
 Cython
-NumPy
+NumPy==1.15.0
 flake8
 moto
 pytest>=3.1