diff --git a/tangostationcontrol/requirements.txt b/tangostationcontrol/requirements.txt
index a93c35d3d5a643afaf0d78f53cdd2c36be65f8f2..0cb186f10ceb7b41693b948a4abd81b17c61c053 100644
--- a/tangostationcontrol/requirements.txt
+++ b/tangostationcontrol/requirements.txt
@@ -11,5 +11,5 @@ h5py >= 3.1.0 # BSD
 psutil >= 5.8.0 # BSD
 docker >= 5.0.3 # Apache 2
 python-logstash-async >= 2.3.0 # MIT
-python-casacore >= 3.3.1 # GPL2
+python-casacore >= 3.3.1 # LGPLv3
 etrs-itrs@git+https://github.com/brentjens/etrs-itrs # license pending