diff --git a/requirements.txt b/requirements.txt
index bba4672..089e17f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # duplicated in environment.yml
 gdal[numpy]==3.10
-harmony-service-lib==2.3.0
+harmony-service-lib==2.4.0
 numpy==2.2.2
 pystac==1.11.0
 pytest==8.3.4