diff --git a/requirements.txt b/requirements.txt
index 23bc56f9..76629eed 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 future>=0.16.0
 joblib>=0.14.1
-numpy>=1.13.0
+numpy>=1.13.0,<2.0
 Pillow>=4.3.0
 read-roi>=1.5.0; python_version>='3.0'
 scikit-image>=0.13.0