diff --git a/tn.py b/tn.py
index c4785eb..9464fe7 100644
--- a/tn.py
+++ b/tn.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import cv2
+
 import numpy as np
 import networkx as nx
 from networkx.algorithms.dag import dag_longest_path