diff --git a/chapter2/ns_code2.ipynb b/chapter2/ns_code2.ipynb
index d894cf5e..237dca40 100644
--- a/chapter2/ns_code2.ipynb
+++ b/chapter2/ns_code2.ipynb
@@ -651,6 +651,7 @@
     "            if pressure is not None:\n",
     "                p_diff[i] -= pressure[0]\n",
     "                break\n",
+    "progress.close()\n",
     "vtx_u.close()\n",
     "vtx_p.close()"
    ]
diff --git a/chapter2/ns_code2.py b/chapter2/ns_code2.py
index 12062c89..1c0be052 100644
--- a/chapter2/ns_code2.py
+++ b/chapter2/ns_code2.py
@@ -478,6 +478,7 @@ def __call__(self, x):
             if pressure is not None:
                 p_diff[i] -= pressure[0]
                 break
+progress.close()
 vtx_u.close()
 vtx_p.close()