diff --git a/op25Handler.py b/op25Handler.py
index b8007ac..86d85b3 100644
--- a/op25Handler.py
+++ b/op25Handler.py
@@ -73,7 +73,7 @@ class OP25Handler(threading.Thread):
 
         print(p25_kwargs)
 
-        self.OP25Proc = subprocess.Popen(p25_kwargs, executable=self.OP25EXE, shell=True, stdin=subprocess.PIPE,
+        self.OP25Proc = subprocess.Popen(p25_kwargs, executable=self.OP25EXE, shell=False, stdin=subprocess.PIPE,
                                          stdout=subprocess.PIPE,  stderr=subprocess.STDOUT, cwd=self.OP25Dir)
 
         #os.chdir(cwd)