diff --git a/requirements.txt b/requirements.txt
index cb50cf8f32e1..fd187eb56cfe 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,18 @@
 # pip install -r requirements.txt
 
 # base ----------------------------------------
-Cython
 matplotlib>=3.2.2
 numpy>=1.18.5
 opencv-python>=4.1.2
 Pillow
 PyYAML>=5.3.1
 scipy>=1.4.1
-tensorboard>=2.2
 torch>=1.7.0
 torchvision>=0.8.1
 tqdm>=4.41.0
 
 # logging -------------------------------------
+tensorboard>=2.4.1
 # wandb
 
 # plotting ------------------------------------