diff --git a/plugins/libvirt/kvm_mem b/plugins/libvirt/kvm_mem
index fb63f784..2ada1da1 100755
--- a/plugins/libvirt/kvm_mem
+++ b/plugins/libvirt/kvm_mem
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 # vim: set fileencoding=utf-8
 #
@@ -92,7 +92,7 @@ def list_pids():
     ''' Find the pid of kvm processes
     @return a list of pids from running kvm
     '''
-    pid = Popen("pidof qemu-kvm qemu-system-x86_64 kvm", shell=True, stdout=PIPE)
+    pid = Popen("pidof qemu-kvm qemu-system-x86_64 kvm", shell=True, stdout=PIPE, text=True)
     return pid.communicate()[0].split()
 
 if __name__ == "__main__":