diff --git a/apps/hidclient.py b/apps/hidclient.py
old mode 100644
new mode 100755
index 3421e00..b70891f
--- a/apps/hidclient.py
+++ b/apps/hidclient.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 import sys, getopt
 from hidman.core import HIDClient
 
@@ -15,8 +17,8 @@ def main(argv):
           client = HIDClient(address="tcp://%s:6666" % server_address)
           while True:
               print(client.waitKey())
-   print('hidclient.py -s <server_address>') 
+   print('hidclient.py -s <server_address>')
    sys.exit()
 
 if __name__ == "__main__":
-   main(sys.argv[1:])
\ No newline at end of file
+   main(sys.argv[1:])
diff --git a/apps/hiddevice.py b/apps/hiddevice.py
old mode 100644
new mode 100755
index a2bad01..abcaa4f
--- a/apps/hiddevice.py
+++ b/apps/hiddevice.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 import sys, getopt
 from hidman.core import HIDDevice
 
@@ -16,7 +18,7 @@ def main(argv):
           while True:
              print(dev.waitKey())
           dev.close()
-   print('hiddevice.py -d <device>') 
+   print('hiddevice.py -d <device>')
    sys.exit()
 
 if __name__ == "__main__":
diff --git a/apps/hidserver.py b/apps/hidserver.py
old mode 100644
new mode 100755
index 7fe8026..329e4a6
--- a/apps/hidserver.py
+++ b/apps/hidserver.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 import sys, getopt
 from hidman.core import HIDServer
 
@@ -14,9 +16,8 @@ def main(argv):
           print('Device is: ', device)
           serv = HIDServer(device=device, address="tcp://*:6666")
           serv.run()
-   print('hidserver.py -d <device>') 
+   print('hidserver.py -d <device>')
    sys.exit()
 
 if __name__ == "__main__":
    main(sys.argv[1:])
-
diff --git a/apps/latency_test.py b/apps/latency_test.py
old mode 100644
new mode 100755
index 3dd7c33..a6cae62
--- a/apps/latency_test.py
+++ b/apps/latency_test.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 import threading
 import time
 import statistics