diff --git a/notebooks/pnCCD/Characterize_pnCCD_Gain.ipynb b/notebooks/pnCCD/Characterize_pnCCD_Gain.ipynb
index 1c300edaf15236abf7d7579d0eef23c4038e3ee1..9c8b3f53ad60aa38089ec9f687e86ffd62228d72 100644
--- a/notebooks/pnCCD/Characterize_pnCCD_Gain.ipynb
+++ b/notebooks/pnCCD/Characterize_pnCCD_Gain.ipynb
@@ -483,7 +483,7 @@
     "tpats = 0\n",
     "\n",
     "for k, f in enumerate(file_list):\n",
-    "    with h5py.File(f, 'r', driver='core') as infile:\n",
+    "    with h5py.File(f, 'r') as infile:\n",
     "        data = infile[h5path+\"/pixels_classified\"][()]\n",
     "        patterns = infile[h5path+\"/patterns\"][()]\n",
     "        bpix = infile[h5path+\"/mask\"][()]\n",
diff --git a/notebooks/pnCCD/Correct_pnCCD_NBC.ipynb b/notebooks/pnCCD/Correct_pnCCD_NBC.ipynb
index 9bbaf925b071be253560c81f4ebae5ebce3b87cb..db8da2b619ff4062322f6782a48894ef4d124f4c 100644
--- a/notebooks/pnCCD/Correct_pnCCD_NBC.ipynb
+++ b/notebooks/pnCCD/Correct_pnCCD_NBC.ipynb
@@ -694,7 +694,7 @@
     "    relGain = constants[\"RelativeGain\"]\n",
     "\n",
     "for k, f in enumerate(file_list):\n",
-    "    with h5py.File(f, 'r', driver='core') as infile:\n",
+    "    with h5py.File(f, 'r') as infile:\n",
     "        out_fileb = \"{}/{}\".format(out_folder, f.split(\"/\")[-1])\n",
     "        out_file = out_fileb.replace(\"RAW\", \"CORR\")\n",
     "\n",
@@ -1283,9 +1283,7 @@
     "    triples = []\n",
     "    quads =  []\n",
     "\n",
-    "    with h5py.File(\"{}/CORR-R{:04d}-PNCCD01-S{:05d}.h5\".format(out_folder, run, sequences[seq_num]), 'r', \n",
-    "                   driver='core') as infile:\n",
-    "\n",
+    "    with h5py.File(\"{}/CORR-R{:04d}-PNCCD01-S{:05d}.h5\".format(out_folder, run, sequences[seq_num]), 'r') as infile:\n",
     "            data = infile[h5path+\"/pixels_classified\"][()].astype(np.float32) # classifications\n",
     "            patterns = infile[h5path+\"/patterns\"][()].astype(np.float32) # event patterns\n",
     "            \n",