diff --git a/packages/k4marlinwrapper/package.py b/packages/k4marlinwrapper/package.py
index 52cc8e27..2f251fa5 100644
--- a/packages/k4marlinwrapper/package.py
+++ b/packages/k4marlinwrapper/package.py
@@ -39,7 +39,7 @@ class K4marlinwrapper(CMakePackage, Ilcsoftpackage):
     depends_on("edm4hep")
     depends_on("edm4hep@0.10.1:")
     depends_on("k4edm4hep2lcioconv")
-    depends_on("k4edm4hep2lcioconv@0.9:", when="@0.9:")
+    depends_on("k4edm4hep2lcioconv@00-09:", when="@0.9:")
     # for the doctest:
     depends_on("py-jupytext", type=("test"))
     depends_on("py-ipykernel", type=("test"))