diff --git a/tools/wptrunner/requirements_firefox.txt b/tools/wptrunner/requirements_firefox.txt
index 6bf280c47c92ca..21be00cc1b183d 100644
--- a/tools/wptrunner/requirements_firefox.txt
+++ b/tools/wptrunner/requirements_firefox.txt
@@ -7,4 +7,4 @@ mozprocess==1.3.0
 mozprofile==2.5.0
 mozrunner==8.2.1
 mozversion==2.3.0
-psutil==5.8.0
+psutil==5.9.3
diff --git a/tools/wptrunner/requirements_safari.txt b/tools/wptrunner/requirements_safari.txt
index 65b76aa85cc41f..20ef82cf636b08 100644
--- a/tools/wptrunner/requirements_safari.txt
+++ b/tools/wptrunner/requirements_safari.txt
@@ -1,2 +1,2 @@
 mozprocess==1.3.0
-psutil==5.8.0
+psutil==5.9.3