diff --git a/graphtools/base.py b/graphtools/base.py
index 8ec1b57..edd678a 100644
--- a/graphtools/base.py
+++ b/graphtools/base.py
@@ -65,6 +65,9 @@ def _get_param_names(cls):
 
         return parameters
 
+    def set_params(self, **kwargs):
+        return self
+
 
 class Data(Base):
     """Parent class that handles the import and dimensionality reduction of data
@@ -202,6 +205,7 @@ def set_params(self, **params):
             raise ValueError("Cannot update n_pca. Please create a new graph")
         if 'random_state' in params:
             self.random_state = params['random_state']
+        super().set_params(**params)
         return self
 
     def transform(self, Y):
@@ -441,6 +445,7 @@ def set_params(self, **params):
                 params['kernel_symm'] != self.kernel_symm:
             raise ValueError(
                 "Cannot update kernel_symm. Please create a new graph")
+        super().set_params(**params)
         return self
 
     @property
diff --git a/graphtools/graphs.py b/graphtools/graphs.py
index 6915cea..fb1b2a3 100644
--- a/graphtools/graphs.py
+++ b/graphtools/graphs.py
@@ -681,14 +681,14 @@ def set_params(self, **params):
             raise ValueError("Cannot update precomputed. "
                              "Please create a new graph")
         if 'distance' in params and params['distance'] != self.distance and \
-                self.precomputed is not None:
+                self.precomputed is None:
             raise ValueError("Cannot update distance. "
                              "Please create a new graph")
         if 'knn' in params and params['knn'] != self.knn and \
-                self.precomputed is not None:
+                self.precomputed is None:
             raise ValueError("Cannot update knn. Please create a new graph")
         if 'decay' in params and params['decay'] != self.decay and \
-                self.precomputed is not None:
+                self.precomputed is None:
             raise ValueError("Cannot update decay. Please create a new graph")
         # update superclass parameters
         super().set_params(**params)
diff --git a/test/test_landmark.py b/test/test_landmark.py
index 04fbd21..42d9025 100644
--- a/test/test_landmark.py
+++ b/test/test_landmark.py
@@ -132,18 +132,18 @@ def test_verbose():
 def test_set_params():
     G = build_graph(data, n_landmark=500, decay=None)
     G.landmark_op
-    assert G.get_params == {'n_pca': 20,
-                            'random_state': 42,
-                            'kernel_symm': '+',
-                            'gamma': None,
-                            'n_landmark': 500,
-                            'knn': 3,
-                            'decay': None,
-                            'distance':
-                            'euclidean',
-                            'thresh': 0,
-                            'n_jobs': -1,
-                            'verbose': 0}
+    assert G.get_params() == {'n_pca': 20,
+                              'random_state': 42,
+                              'kernel_symm': '+',
+                              'gamma': None,
+                              'n_landmark': 500,
+                              'knn': 3,
+                              'decay': None,
+                              'distance':
+                              'euclidean',
+                              'thresh': 0,
+                              'n_jobs': -1,
+                              'verbose': 0}
     G.set_params(n_landmark=300)
     assert G.landmark_op.shape == (300, 300)
     G.set_params(n_landmark=G.n_landmark, n_svd=G.n_svd)