diff --git a/tangostationcontrol/requirements.txt b/tangostationcontrol/requirements.txt
index eb2a12383153689a0baa3727144a36570fa5f00a..6bb820aeaa883e039ee012e46d6025b98f9cbc5c 100644
--- a/tangostationcontrol/requirements.txt
+++ b/tangostationcontrol/requirements.txt
@@ -14,5 +14,5 @@ python-logstash-async >= 2.3.0 # MIT
 python-casacore >= 3.3.1 # LGPLv3
 etrs-itrs@git+https://github.com/brentjens/etrs-itrs # license pending
 # numpy must be manually added even though etrs-itrs requires it
-numpy >= 1.22.0 # BSD
+numpy >= 1.21.0 # BSD
 lofarantpos >= 0.5.0 # Apache 2