diff --git a/lale/datasets/uci/uci_datasets.py b/lale/datasets/uci/uci_datasets.py
index 532d938db..3c63be405 100644
--- a/lale/datasets/uci/uci_datasets.py
+++ b/lale/datasets/uci/uci_datasets.py
@@ -107,7 +107,7 @@ def fetch_drugscom():
                 {"description": "drugName", "type": "string"},
                 {
                     "description": "condition",
-                    "anyOf": [{"type": "string"}, {"enum": [np.NaN]}],
+                    "anyOf": [{"type": "string"}, {"enum": [np.nan]}],
                 },
                 {"description": "review", "type": "string"},
                 {
diff --git a/lale/lib/xgboost/xgb_classifier.py b/lale/lib/xgboost/xgb_classifier.py
index 3ffb9d268..9751b3937 100644
--- a/lale/lib/xgboost/xgb_classifier.py
+++ b/lale/lib/xgboost/xgb_classifier.py
@@ -789,10 +789,10 @@ def score(self, X, y):
                     "type": "number",
                 },
                 {
-                    "enum": [None, np.NaN],
+                    "enum": [None, np.nan],
                 },
             ],
-            "default": np.NaN,
+            "default": np.nan,
             "description": "Value in the data which needs to be present as a missing value. If"
             " If None, defaults to np.nan.",
         },
diff --git a/lale/lib/xgboost/xgb_regressor.py b/lale/lib/xgboost/xgb_regressor.py
index 619625a10..944eb07e6 100644
--- a/lale/lib/xgboost/xgb_regressor.py
+++ b/lale/lib/xgboost/xgb_regressor.py
@@ -714,10 +714,10 @@ def score(self, X, y):
                     "type": "number",
                 },
                 {
-                    "enum": [None, np.NaN],
+                    "enum": [None, np.nan],
                 },
             ],
-            "default": np.NaN,
+            "default": np.nan,
             "description": "Value in the data which needs to be present as a missing value. If"
             " If None, defaults to np.nan.",
         },