diff --git a/chipsec/hal/uefi.py b/chipsec/hal/uefi.py
index eac31d2b..48633893 100644
--- a/chipsec/hal/uefi.py
+++ b/chipsec/hal/uefi.py
@@ -109,8 +109,8 @@ EFI_VAR_NAME_AuthVarKeyDatabase = 'AuthVarKeyDatabase'
 #    0x8BE4DF61, 0x93CA, 0x11d2, {0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C } \
 #  }
 #
-EFI_GLOBAL_VARIABLE_GUID         = '8BE4DF61-93CA-11D2-AA0D-00E098032B8C'
-EFI_IMAGE_SECURITY_DATABASE_GUID = 'D719B2CB-3D3A-4596-A3BC-DAD00E67656F'
+EFI_GLOBAL_VARIABLE_GUID         = '8be4df61-93ca-11d2-aa0d-00e098032b8c'
+EFI_IMAGE_SECURITY_DATABASE_GUID = 'd719b2cb-3d3a-4596-a3bc-dad00e67656f'
 #EFI_VAR_GUID_SecureBoot = EFI_GLOBAL_VARIABLE
 #EFI_VAR_GUID_db         = EFI_IMAGE_SECURITY_DATABASE_GUID