diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 91649aa..f0bdf33
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,6 @@ future==0.17.1
 lxml==4.4.1
 monotonic==1.5
 pkg-resources==0.0.0
-psutil==5.6.3
+psutil==5.6.6
 pymavlink==2.3.8
 six==1.12.0