diff --git a/gwpopulation/hyperpe.py b/gwpopulation/hyperpe.py
index 826a5d22..f7713de2 100644
--- a/gwpopulation/hyperpe.py
+++ b/gwpopulation/hyperpe.py
@@ -211,17 +211,17 @@ def generate_extra_statistics(self, sample):
         ln_ls, variances = self._compute_per_event_ln_bayes_factors(
             return_uncertainty=True
         )
-        total_variance = float(sum(variances))
+        total_variance = sum(variances)
         for ii in range(self.n_posteriors):
-            sample[f"ln_bf_{ii}"] = float(ln_ls[ii])
-            sample[f"var_{ii}"] = float(variances[ii])
+            sample[f"ln_bf_{ii}"] = to_number(ln_ls[ii], float)
+            sample[f"var_{ii}"] = to_number(variances[ii], float)
         selection, variance = self._selection_function_with_uncertainty()
         variance /= selection**2
         selection_variance = variance * self.n_posteriors**2
         sample["selection"] = selection
         sample["selection_variance"] = variance
         total_variance += selection_variance
-        sample["variance"] = float(total_variance)
+        sample["variance"] = to_number(total_variance, float)
         if added_keys is not None:
             for key in added_keys:
                 self.parameters.pop(key)