diff --git a/04_caselaw.ipynb b/04_caselaw.ipynb
index 7fb7e5a..314af18 100644
--- a/04_caselaw.ipynb
+++ b/04_caselaw.ipynb
@@ -376,7 +376,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -390,7 +390,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.10"
+   "version": "3.11.5"
   }
  },
  "nbformat": 4,
diff --git a/07_Strings.ipynb b/07_Strings.ipynb
index 26a54e8..06ab3fd 100644
--- a/07_Strings.ipynb
+++ b/07_Strings.ipynb
@@ -290,7 +290,7 @@
    "source": [
     "###  <span style=\"color:green\">Case Law Exercise: Attorneys Sorted </span>\n",
     "\n",
-    "Here, we expand on the exercise \"Attorneys and Head Matter\" from the chapter \"JSON and Case Law\", so you might want to have a look at your solution to that.\n",
+    "Here, we expand on the exercise \"Attorneys and Head Matter\" from the chapter [](04_caselaw.ipynb), so you might want to have a look at your solution to that.\n",
     "Complete the code below to print the attorneys for each case in alphabetical order.\n",
     "\n",
     "(The simplest solution uses the names as they occur in the data, starting with first names.\n",
@@ -320,7 +320,7 @@
    "source": [
     "###  <span style=\"color:green\">Library Data Exercise: Creators Sorted </span>\n",
     "\n",
-    "Here, we expand on the exercise \"Creators\" from the chapter \"JSON for librarians\", so you might want to have a look at your solution to that.\n",
+    "Here, we expand on the exercise \"Creators\" from the chapter [](04_library_catalogue.ipynb), so you might want to have a look at your solution to that.\n",
     "Complete the code below to print the creators for each case in alphabetical order.\n",
     "\n",
     "If you're starting from scratch, you will need to browse the\n",
@@ -361,7 +361,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -375,9 +375,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.10"
+   "version": "3.11.5"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }