diff --git a/pyPLNmodels/models.py b/pyPLNmodels/models.py
index 83104e2282b16d945eac5a27c4c1a42bcdcd3ca4..4175b6f62916bae3fe6f5eb792a55532d7116b5e 100644
--- a/pyPLNmodels/models.py
+++ b/pyPLNmodels/models.py
@@ -847,7 +847,7 @@ class model(ABC):
         dict
             The dictionary representing the model.
         """
-        return self.dict_data | self._dict_parameters
+        return {**self.dict_data, **self._dict_parameters}
 
     @property
     def _dict_parameters(self):
@@ -859,7 +859,7 @@ class model(ABC):
         dict
             The dictionary of parameters.
         """
-        return self.model_parameters | self.latent_parameters
+        return {**self.model_parameters, **self.latent_parameters}
 
     @property
     def coef(self):