diff --git a/spec2nii/__init__.py b/spec2nii/__init__.py
index f5f115f..c7b0b12 100644
--- a/spec2nii/__init__.py
+++ b/spec2nii/__init__.py
@@ -5,4 +5,4 @@
 
 # Register the duecredit citation for spec2nii
 due.cite(Doi('10.1002/mrm.29418'), description='Multi-format in vivo MR spectroscopy conversion to NIFTI',
-         path='spec2nii', version=__version__, tag='reference-implementation', cite_module=True)
+         path='spec2nii', version=__version__, tags=['reference-implementation'], cite_module=True)