diff --git a/server/ai/requirements.txt b/server/ai/requirements.txt
index 27a7b1eb5..1c34fa0da 100755
--- a/server/ai/requirements.txt
+++ b/server/ai/requirements.txt
@@ -11,7 +11,7 @@ Jinja2==2.10
 kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==2.2.3
-numpy==1.15.1
+numpy>=1.15.1,<2.0
 pyparsing==2.2.1
 python-dateutil==2.7.3
 pytz==2018.5