diff --git a/requirements-core.txt b/requirements-core.txt
index f9bb9c19bd..d0ba9164e2 100644
--- a/requirements-core.txt
+++ b/requirements-core.txt
@@ -6,7 +6,7 @@ lxml>=4.4.1
 matplotlib>=3.3.1,<3.9.1
 networkx>=2.5
 nibabel>=3.2.1
-numpy>=1.17.3
+numpy>=1.17.3,<2
 orjson>=3.6.6
 Pillow>=6.1.0
 ruamel.yaml>=0.17.0