diff --git a/src/alphafold3/common/folding_input.py b/src/alphafold3/common/folding_input.py
index 6acdda8f..902e0f8c 100644
--- a/src/alphafold3/common/folding_input.py
+++ b/src/alphafold3/common/folding_input.py
@@ -410,9 +410,7 @@ def to_dict(
           {
               'mmcif': template.mmcif,
               'queryIndices': list(template.query_to_template_map.keys()),
-              'templateIndices': (
-                  list(template.query_to_template_map.values()) or None
-              ),
+              'templateIndices': list(template.query_to_template_map.values()),
           }
           for template in self._templates
       ]