diff --git a/requirements.txt b/requirements.txt
index 73c7109..2ad2875 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ numexpr==2.6.4
 numpy==1.14.0
 pandas==0.22.0
 pkginfo==1.4.2
-psutil==5.4.3
+psutil==5.6.6
 pycosat==0.6.3
 pycparser==2.18
 pyOpenSSL==17.5.0