diff --git a/dploot/triage/masterkeys.py b/dploot/triage/masterkeys.py
index b1db132..6e7214c 100755
--- a/dploot/triage/masterkeys.py
+++ b/dploot/triage/masterkeys.py
@@ -41,7 +41,7 @@ class MasterkeysTriage:
     system_masterkeys_generic_path = 'Windows\\System32\\Microsoft\\Protect'
     share = 'C$'
 
-    def __init__(self, target: Target, conn: DPLootSMBConnection, pvkbytes: bytes = None, passwords: Dict[str,str] = None, nthashes: Dict[str,str] = None, dpapiSystem: Dict[str,str] = {}) -> None:
+    def __init__(self, target: Target, conn: DPLootSMBConnection, pvkbytes: bytes = None, passwords: Dict[str,str] = None, nthashes: Dict[str,str] = None, dpapiSystem: Dict[str,str] = None) -> None:
         self.target = target
         self.conn = conn
         self.pvkbytes = pvkbytes
@@ -51,6 +51,8 @@ def __init__(self, target: Target, conn: DPLootSMBConnection, pvkbytes: bytes =
         self._users = None
         self.looted_files = dict()
         self.dpapiSystem = dpapiSystem
+        if self.dpapiSystem is None:
+            self.dpapiSystem = {}
         # should be {"MachineKey":"key","Userkey":"key"}
 
     def triage_system_masterkeys(self) -> List[Masterkey]:
diff --git a/pyproject.toml b/pyproject.toml
index 6843869..9cd22a0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dploot"
-version = "2.7.1"
+version = "2.7.2"
 description = "DPAPI looting remotely in Python"
 readme = "README.md"
 homepage = "https://github.com/zblurx/dploot"