diff --git a/BaseTools/Source/Python/Pkcs7Sign/Pkcs7Sign.py b/BaseTools/Source/Python/Pkcs7Sign/Pkcs7Sign.py
index f0b2d8a559..6412587e4b 100644
--- a/BaseTools/Source/Python/Pkcs7Sign/Pkcs7Sign.py
+++ b/BaseTools/Source/Python/Pkcs7Sign/Pkcs7Sign.py
@@ -6,7 +6,7 @@
 #
 # This tool has been tested with OpenSSL.
 #
-# Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
@@ -109,7 +109,7 @@ if __name__ == '__main__':
   # Verify that Open SSL command is available
   #
   try:
-    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
   except:
     print 'ERROR: Open SSL command not available.  Please verify PATH or set OPENSSL_PATH'
     sys.exit(1)
diff --git a/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256GenerateKeys.py b/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256GenerateKeys.py
index 0b1624ab1b..2dd6c20168 100644
--- a/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256GenerateKeys.py
+++ b/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256GenerateKeys.py
@@ -9,7 +9,7 @@
 # on STDOUT.
 # This tool has been tested with OpenSSL 1.0.1e 11 Feb 2013
 #
-# Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
@@ -71,7 +71,7 @@ if __name__ == '__main__':
   # Verify that Open SSL command is available
   #
   try:
-    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
   except:  
     print 'ERROR: Open SSL command not available.  Please verify PATH or set OPENSSL_PATH'
     sys.exit(1)
diff --git a/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256Sign.py b/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256Sign.py
index 199ebec1bb..952583cf4b 100644
--- a/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256Sign.py
+++ b/BaseTools/Source/Python/Rsa2048Sha256Sign/Rsa2048Sha256Sign.py
@@ -4,7 +4,7 @@
 #   {0xa7717414, 0xc616, 0x4977, {0x94, 0x20, 0x84, 0x47, 0x12, 0xa7, 0x35, 0xbf}}
 # This tool has been tested with OpenSSL 1.0.1e 11 Feb 2013
 #
-# Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
@@ -92,7 +92,7 @@ if __name__ == '__main__':
   # Verify that Open SSL command is available
   #
   try:
-    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
   except:  
     print 'ERROR: Open SSL command not available.  Please verify PATH or set OPENSSL_PATH'
     sys.exit(1)