diff --git a/pystsup/requirements.txt b/pystsup/requirements.txt
index 54a30b3..1901be2 100644
--- a/pystsup/requirements.txt
+++ b/pystsup/requirements.txt
@@ -1,5 +1,5 @@
 Pyomo==5.6.6
-numpy==1.17.2
+numpy==1.22.0rc1
 openpyxl==2.6.3
 hopcroftkarp==1.2.4
 pygmo==2.11.3