diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bd159f2..8fb4e36 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,6 +11,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        pydantic: ["1.10.2", ">=2.0.0"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
@@ -22,6 +23,7 @@ jobs:
     - name: Install dependencies
       run: |
         pip install -e '.[test]'
+        pip install pydantic==${{ matrix.pydantic }}
     - name: Run tests
       run: |
         pytest
diff --git a/llm/cli.py b/llm/cli.py
index 129d211..b310af8 100644
--- a/llm/cli.py
+++ b/llm/cli.py
@@ -868,7 +868,7 @@ def load_template(name):
         return Template(name=name, prompt=loaded)
     loaded["name"] = name
     try:
-        return Template.model_validate(loaded)
+        return Template(**loaded)
     except pydantic.ValidationError as ex:
         msg = "A validation error occurred:\n"
         msg += render_errors(ex.errors())
diff --git a/llm/models.py b/llm/models.py
index 585f000..6d0add9 100644
--- a/llm/models.py
+++ b/llm/models.py
@@ -143,7 +143,7 @@ class Response(ABC):
             "prompt_json": self._prompt_json,
             "options_json": {
                 key: value
-                for key, value in self.prompt.options.model_dump().items()
+                for key, value in dict(self.prompt.options).items()
                 if value is not None
             },
             "response": self.text(),
diff --git a/tests/test_cli_openai_models.py b/tests/test_cli_openai_models.py
index 6af7107..a47499f 100644
--- a/tests/test_cli_openai_models.py
+++ b/tests/test_cli_openai_models.py
@@ -51,14 +51,7 @@ def test_openai_options_min_max(mocked_models):
     for option, [min_val, max_val] in options.items():
         result = runner.invoke(cli, ["-m", "chatgpt", "-o", option, "-10"])
         assert result.exit_code == 1
-        assert (
-            result.output
-            == f"Error: {option}\n  Input should be greater than or equal to {min_val}\n"
-        )
-
-        result = runner.invoke(cli, ["-m", "chatgpt", "-o", option, "10"])
-        assert result.exit_code == 1
-        assert (
-            result.output
-            == f"Error: {option}\n  Input should be less than or equal to {max_val}\n"
-        )
+        assert f"greater than or equal to {min_val}" in result.output
+        result2 = runner.invoke(cli, ["-m", "chatgpt", "-o", option, "10"])
+        assert result2.exit_code == 1
+        assert f"less than or equal to {max_val}" in result2.output