diff --git a/src/openfe/protocols/openmm_septop/equil_septop_method.py b/src/openfe/protocols/openmm_septop/equil_septop_method.py
index c82ca81cd..51e0fdedd 100644
--- a/src/openfe/protocols/openmm_septop/equil_septop_method.py
+++ b/src/openfe/protocols/openmm_septop/equil_septop_method.py
@@ -2021,8 +2021,8 @@ def run(
             "topology": topology_file,
             "standard_state_correction_A": corr_A.to("kilocalorie_per_mole"),
             "standard_state_correction_B": corr_B.to("kilocalorie_per_mole"),
-            "restraint_geometry_A": restraint_geom_A.dict(),
-            "restraint_geometry_B": restraint_geom_B.dict(),
+            "restraint_geometry_A": restraint_geom_A.model_dump(),
+            "restraint_geometry_B": restraint_geom_B.model_dump(),
         }
 
     def _execute(