diff --git a/ppcls/arch/backbone/model_zoo/cspnet.py b/ppcls/arch/backbone/model_zoo/cspnet.py
index 30528214fc4fcfb4c37e9c5dbb3c439bf391ded8..ab5021fc6f1abe79103b5fff7e12faa17aafc465 100644
--- a/ppcls/arch/backbone/model_zoo/cspnet.py
+++ b/ppcls/arch/backbone/model_zoo/cspnet.py
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Code was heavily based on https://github.com/rwightman/pytorch-image-models
+
 import paddle
 import paddle.nn as nn
 import paddle.nn.functional as F