diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index dcfa3db4..b9b74108 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,12 +16,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v7
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v7
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/bitcoin/core/__init__.py b/bitcoin/core/__init__.py
index ea578f9b..c70bce98 100644
--- a/bitcoin/core/__init__.py
+++ b/bitcoin/core/__init__.py
@@ -27,7 +27,6 @@
 WITNESS_COINBASE_SCRIPTPUBKEY_MAGIC = bytes([OP_RETURN, 0x24, 0xaa, 0x21, 0xa9, 0xed])
 
 def MoneyRange(nValue, params=None):
-    global coreparams
     if not params:
       params = coreparams
 
@@ -770,7 +769,6 @@ def CheckTransaction(tx):
 
     Raises CheckTransactionError
     """
-    global coreparams
 
     if not tx.vin:
         raise CheckTransactionError("CheckTransaction() : vin empty")