diff --git a/doc/progress.rst b/doc/progress.rst
index 6b42e851f..344a0e3dd 100644
--- a/doc/progress.rst
+++ b/doc/progress.rst
@@ -9,7 +9,7 @@ Changelog
 0.13.1
 ~~~~~~
 
- * Add new contributions here.
+ * FIX #1198: Support numpy 1.24 and higher.
 
 
 0.13.0
diff --git a/openml/extensions/sklearn/extension.py b/openml/extensions/sklearn/extension.py
index f8936b0db..28ecd217f 100644
--- a/openml/extensions/sklearn/extension.py
+++ b/openml/extensions/sklearn/extension.py
@@ -1252,14 +1252,16 @@ def _check_dependencies(self, dependencies: str, strict_version: bool = True) ->
     def _serialize_type(self, o: Any) -> "OrderedDict[str, str]":
         mapping = {
             float: "float",
-            np.float: "np.float",  # type: ignore
             np.float32: "np.float32",
             np.float64: "np.float64",
             int: "int",
-            np.int: "np.int",  # type: ignore
             np.int32: "np.int32",
             np.int64: "np.int64",
         }
+        if LooseVersion(np.__version__) < "1.24":
+            mapping[np.float] = "np.float"
+            mapping[np.int] = "np.int"
+
         ret = OrderedDict()  # type: 'OrderedDict[str, str]'
         ret["oml-python:serialized_object"] = "type"
         ret["value"] = mapping[o]
@@ -1268,14 +1270,16 @@ def _serialize_type(self, o: Any) -> "OrderedDict[str, str]":
     def _deserialize_type(self, o: str) -> Any:
         mapping = {
             "float": float,
-            "np.float": np.float,  # type: ignore
             "np.float32": np.float32,
             "np.float64": np.float64,
             "int": int,
-            "np.int": np.int,  # type: ignore
             "np.int32": np.int32,
             "np.int64": np.int64,
         }
+        if LooseVersion(np.__version__) < "1.24":
+            mapping["np.float"] = np.float
+            mapping["np.int"] = np.int
+
         return mapping[o]
 
     def _serialize_rv_frozen(self, o: Any) -> "OrderedDict[str, Union[str, Dict]]":
diff --git a/setup.py b/setup.py
index 281452548..9f3cdd0e6 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,7 @@
         "python-dateutil",  # Installed through pandas anyway.
         "pandas>=1.0.0",
         "scipy>=0.13.3",
-        "numpy>=1.6.2,<1.24",
+        "numpy>=1.6.2",
         "minio",
         "pyarrow",
     ],
diff --git a/tests/test_extensions/test_sklearn_extension/test_sklearn_extension.py b/tests/test_extensions/test_sklearn_extension/test_sklearn_extension.py
index 26c2dd563..1046970f3 100644
--- a/tests/test_extensions/test_sklearn_extension/test_sklearn_extension.py
+++ b/tests/test_extensions/test_sklearn_extension/test_sklearn_extension.py
@@ -952,7 +952,10 @@ def test_serialize_strings_as_pipeline_steps(self):
         self.assertEqual(extracted_info[2]["drop"].name, "drop")
 
     def test_serialize_type(self):
-        supported_types = [float, np.float, np.float32, np.float64, int, np.int, np.int32, np.int64]
+        supported_types = [float, np.float32, np.float64, int, np.int32, np.int64]
+        if LooseVersion(np.__version__) < "1.24":
+            supported_types.append(np.float)
+            supported_types.append(np.int)
 
         for supported_type in supported_types:
             serialized = self.extension.model_to_flow(supported_type)