diff --git a/packages/hepmcmerger/package.py b/packages/hepmcmerger/package.py
index c11ebcf..d483e5c 100644
--- a/packages/hepmcmerger/package.py
+++ b/packages/hepmcmerger/package.py
@@ -16,7 +16,7 @@ class Hepmcmerger(CMakePackage):
     list_url = "https://github.com/eic/HEPMC_Merger/tags"
     git = "https://github.com/eic/HEPMC_Merger"
 
-    maintainers = ["kkauder"]
+    maintainers("kkauder")
 
     tags = ["eic"]