diff --git a/requirements.txt b/requirements.txt
index 8c091a0..8ba3360 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ nodeenv==1.3.0
 packaging==17.1
 pluggy==0.6.0
 pre-commit==1.8.2
-psutil==5.4.5
+psutil==5.6.6
 purepng==0.2.0
 py==1.5.3
 pycodestyle==2.3.1
diff --git a/setup.py b/setup.py
index 858baf9..4c88072 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
         "nodeenv==1.2.0",
         "pluggy==0.6.0",
         "pre-commit==1.6.0",
-        "psutil==5.4.3",
+        "psutil==5.6.6",
         "py==1.5.2",
         "pycodestyle==2.3.1",
         "pycparser==2.18",