diff --git a/cashu/core/script.py b/cashu/core/script.py
index ef81a7a..6961cef 100644
--- a/cashu/core/script.py
+++ b/cashu/core/script.py
@@ -8,6 +8,7 @@ SEED = b"__not__used"
 
 from bitcoin.core import CMutableTxIn, CMutableTxOut, COutPoint, CTransaction, lx
 from bitcoin.core.script import *
+from bitcoin.core.script import CScript
 from bitcoin.core.scripteval import (
     SCRIPT_VERIFY_P2SH,
     EvalScriptError,
diff --git a/cashu/mint/ledger.py b/cashu/mint/ledger.py
index 522e54d..944c653 100644
--- a/cashu/mint/ledger.py
+++ b/cashu/mint/ledger.py
@@ -162,7 +162,7 @@ class Ledger:
         return amount
 
     def _verify_equation_balanced(
-        self, proofs: List[Proof], outs: List[BlindedMessage]
+        self, proofs: List[Proof], outs: List[BlindedSignature]
     ):
         """Verify that Σoutputs - Σinputs = 0."""
         sum_inputs = sum(self._verify_amount(p.amount) for p in proofs)