diff --git a/devtools/conda-envs/examples.yaml b/devtools/conda-envs/examples.yaml
index a06b6f66e..b30766b09 100644
--- a/devtools/conda-envs/examples.yaml
+++ b/devtools/conda-envs/examples.yaml
@@ -31,6 +31,7 @@ dependencies:
   - toml
   - bson
   - msgpack-python
+  - pydantic =2
   - qcelemental
   - qcportal >=0.50
   - qcengine
diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index 11cc9bc56..a02d92031 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -35,7 +35,7 @@ dependencies:
   - toml
   - bson
   - msgpack-python
-  - pydantic
+  - pydantic =2
   - qcelemental
   - qcportal >=0.50
   - qcengine
diff --git a/devtools/conda-envs/test_env_no_openeye.yaml b/devtools/conda-envs/test_env_no_openeye.yaml
index d49dddb39..8d3528ef5 100644
--- a/devtools/conda-envs/test_env_no_openeye.yaml
+++ b/devtools/conda-envs/test_env_no_openeye.yaml
@@ -32,7 +32,7 @@ dependencies:
   - toml
   - bson
   - msgpack-python
-  - pydantic
+  - pydantic =2
   - qcelemental
   - qcportal >=0.50
   - qcengine
diff --git a/examples/QCArchive_interface/QCarchive_interface.ipynb b/examples/QCArchive_interface/QCarchive_interface.ipynb
index 28b61dee1..59f54260e 100644
--- a/examples/QCArchive_interface/QCarchive_interface.ipynb
+++ b/examples/QCArchive_interface/QCarchive_interface.ipynb
@@ -562,7 +562,7 @@
     }
    ],
    "source": [
-    "entry.dict()"
+    "entry.model_dump()"
    ]
   },
   {
@@ -590,7 +590,7 @@
     "molecule_from_entry = Molecule.from_qcschema(entry)\n",
     "\n",
     "# we could have also used the dictionary representation of the object\n",
-    "molecule_from_dict = Molecule.from_qcschema(entry.dict())\n",
+    "molecule_from_dict = Molecule.from_qcschema(entry.model_dump())\n",
     "\n",
     "assert molecule_from_entry == molecule_from_dict\n",
     "\n",
diff --git a/openff/toolkit/_tests/test_molecule.py b/openff/toolkit/_tests/test_molecule.py
index db6c9ca50..ecf6f7b00 100644
--- a/openff/toolkit/_tests/test_molecule.py
+++ b/openff/toolkit/_tests/test_molecule.py
@@ -3296,7 +3296,7 @@ def test_qcschema_molecule_record_round_trip_from_to_from(self):
             "Molecule roundtrip to/from_qcschema failed",
         )
 
-        mol_dict = off_qcschema.dict()
+        mol_dict = off_qcschema.model_dump()
         del mol_dict["extras"]["canonical_isomeric_explicit_hydrogen_mapped_smiles"]
         del mol_dict["identifiers"]["canonical_isomeric_explicit_hydrogen_mapped_smiles"]
         with pytest.raises(MissingCMILESError):
diff --git a/openff/toolkit/topology/molecule.py b/openff/toolkit/topology/molecule.py
index 285e228e3..aa16cd819 100644
--- a/openff/toolkit/topology/molecule.py
+++ b/openff/toolkit/topology/molecule.py
@@ -4705,7 +4705,7 @@ def from_qcschema(
         # Process input as dict; convert if necessary
         if not isinstance(qca_object, dict):
             try:
-                qca_object = qca_object.dict()
+                qca_object = qca_object.model_dump()
             except AttributeError:
                 raise AttributeError(
                     f"The input object (type {type(qca_object)=} "