diff --git a/requirements.txt b/requirements.txt
index ed30c6ed..de9e4df7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ imageio==2.5.0
 numpy==1.16.3
 Pillow==6.0.0
 protobuf==3.7.1
-psutil==5.6.2
+psutil==5.6.6
 pytest==4.5.0
 # pytest==3.9.1 # strange... Python 3.7.0 sometimes donot work with pytest==4.5.0; can use 3.9.1
 pytest-cov==2.7.1
diff --git a/scripts/requirements.txt b/scripts/requirements.txt
index f334db09..b2a73627 100644
--- a/scripts/requirements.txt
+++ b/scripts/requirements.txt
@@ -1,4 +1,4 @@
 matplotlib # for plot_train_curve.py
 # matplotlib==3.1.0
 ray==0.6.6 # for ray_pipeline.py
-psutil==5.6.2 # for ray_pipeline.py
+psutil==5.6.6 # for ray_pipeline.py