diff --git a/src/talos/CreateTalosHTML.py b/src/talos/CreateTalosHTML.py
index 67dd3bf2..81d00eb2 100644
--- a/src/talos/CreateTalosHTML.py
+++ b/src/talos/CreateTalosHTML.py
@@ -656,7 +656,7 @@ def __init__(self, report_variant: ReportVariant, sample: Sample, ext_labels: li
             and GNOMAD_SV_KEY in self.var_data.info
             and isinstance(self.var_data.info[GNOMAD_SV_KEY], str)
         ):
-            self.var_data.info['gnomad_key'] = self.var_data.info[GNOMAD_SV_KEY].split('v2.1_')[-1]
+            self.var_data.info['gnomad_key'] = self.var_data.info[GNOMAD_SV_KEY].split('v2.1_')[-1]  # type: ignore[union-attr]
 
     def __str__(self) -> str:
         return f'{self.chrom}-{self.pos}-{self.ref}-{self.alt}'