diff --git a/openff/evaluator/datasets/thermoml/thermoml.py b/openff/evaluator/datasets/thermoml/thermoml.py
index 62fdf4e4..80f57071 100644
--- a/openff/evaluator/datasets/thermoml/thermoml.py
+++ b/openff/evaluator/datasets/thermoml/thermoml.py
@@ -2144,7 +2144,7 @@ def _from_url(cls, url, source=None):
 
             return_value = cls.from_xml(request.text, source)
 
-        except HTTPError:
+        except (HTTPError, requests.exceptions.HTTPError):
             logger.warning(f"No ThermoML file could not be found at {url}")
 
         return return_value