diff --git a/plugins/libvirt/kvm_net b/plugins/libvirt/kvm_net
index e03794ba..1399fdb5 100755
--- a/plugins/libvirt/kvm_net
+++ b/plugins/libvirt/kvm_net
@@ -96,9 +96,9 @@ def fetch(vms):
 
 def detect_kvm():
     """ Check if kvm is installed """
-    kvm = Popen("which kvm", shell=True, stdout=PIPE)
+    kvm = Popen(["which", "kvm"], stdout=PIPE)
     kvm.communicate()
-    return not bool(kvm.returncode)
+    return kvm.returncode == 0
 
 
 def find_vm_names(pids):
@@ -130,7 +130,7 @@ def list_pids():
 
     @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"], stdout=PIPE)
     return pid.communicate()[0].decode().split()