diff --git a/requirements.txt b/requirements.txt
index bb0d8ebb704..8e664ae3096 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # basic dependencies
-numpy~=1.15
+numpy>=1.15
 periodictable~=1.5
 
 # PICMI