diff --git a/autogl/solver/__init__.py b/autogl/solver/__init__.py
index 9fef37a..1cba0b1 100644
--- a/autogl/solver/__init__.py
+++ b/autogl/solver/__init__.py
@@ -3,7 +3,7 @@ Auto solver for various graph tasks
 """
 
 from .classifier import AutoGraphClassifier, AutoNodeClassifier, AutoLinkPredictor
-from ..utils import LeaderBoard
+from .utils import LeaderBoard
 
 __all__ = [
     "AutoNodeClassifier",
diff --git a/autogl/solver/classfier/__init__.py b/autogl/solver/classifier/__init__.py
similarity index 90%
rename from autogl/solver/classfier/__init__.py
rename to autogl/solver/classifier/__init__.py
index 7cc0b07..e30c582 100644
--- a/autogl/solver/classfier/__init__.py
+++ b/autogl/solver/classifier/__init__.py
@@ -2,7 +2,7 @@
 Auto classifier for classification problems.
 """
 
-from ..base import BaseClassifier
+from .base import BaseClassifier
 from .graph_classifier import AutoGraphClassifier
 from .node_classifier import AutoNodeClassifier
 from .link_predictor import AutoLinkPredictor
diff --git a/autogl/solver/classfier/base.py b/autogl/solver/classifier/base.py
similarity index 100%
rename from autogl/solver/classfier/base.py
rename to autogl/solver/classifier/base.py
diff --git a/autogl/solver/classfier/graph_classifier.py b/autogl/solver/classifier/graph_classifier.py
similarity index 100%
rename from autogl/solver/classfier/graph_classifier.py
rename to autogl/solver/classifier/graph_classifier.py
diff --git a/autogl/solver/classfier/link_predictor.py b/autogl/solver/classifier/link_predictor.py
similarity index 100%
rename from autogl/solver/classfier/link_predictor.py
rename to autogl/solver/classifier/link_predictor.py
diff --git a/autogl/solver/classfier/node_classifier.py b/autogl/solver/classifier/node_classifier.py
similarity index 100%
rename from autogl/solver/classfier/node_classifier.py
rename to autogl/solver/classifier/node_classifier.py