diff --git a/src/UQpy/run_model/model_execution/ThirdPartyModel.py b/src/UQpy/run_model/model_execution/ThirdPartyModel.py
index 548ed5a8..0d09334f 100644
--- a/src/UQpy/run_model/model_execution/ThirdPartyModel.py
+++ b/src/UQpy/run_model/model_execution/ThirdPartyModel.py
@@ -310,7 +310,7 @@ def _find_and_replace_var_names_with_values(self, sample):
                         print("\nUQpy: Index Error: {0}\n".format(err))
                         raise IndexError("{0}".format(err))
 
-                    if isinstance(temp, collections.Iterable):
+                    if isinstance(temp, collections.abc.Iterable):
                         # If it is iterable, flatten and write as text file with designated separator
                         temp = np.array(temp).flatten()
                         to_add = ""