diff --git a/.github/code_of_conduct.md b/.github/code_of_conduct.md
index 3a0e46b0cda..32b7b6728de 100644
--- a/.github/code_of_conduct.md
+++ b/.github/code_of_conduct.md
@@ -67,9 +67,9 @@ members of the project's leadership.
 
 ## Attribution
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4.
+This Code of Conduct is adapted from the [Contributor Covenant][contrib-cov], version 1.4.
 
-[homepage]: "https://www.contributor-covenant.org/version/1/4/code-of-conduct.html"
+[contrib-cov]: https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
 
 For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq
+<https://contributor-covenant.org/faq>
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 678a14128a6..6aed8af9f87 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -58,7 +58,7 @@ repos:
         args: [--disable, MD013, MD024, MD025, MD033, MD041, "--"]
 
   - repo: https://github.com/kynan/nbstripout
-    rev: 0.6.1
+    rev: 0.7.1
     hooks:
       - id: nbstripout
         args: [--drop-empty-cells, --keep-output]
diff --git a/examples/aims_io/FHI-aims-example.ipynb b/examples/aims_io/FHI-aims-example.ipynb
index d48e8a14fc9..9cbf9a27e84 100644
--- a/examples/aims_io/FHI-aims-example.ipynb
+++ b/examples/aims_io/FHI-aims-example.ipynb
@@ -3,7 +3,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "8e09cccf-4335-4c59-bfa7-d3e3caeef404",
+   "id": "0",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -21,7 +21,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "536af143-f892-4549-86d7-ff426ba265ed",
+   "id": "1",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -35,7 +35,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "4d8d9fda-af37-45eb-971c-56fed59f3a27",
+   "id": "2",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -50,7 +50,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "8e67e134-84f8-4c35-afe4-87cd66e2e781",
+   "id": "3",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -84,7 +84,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "096337d6-871a-48dc-b4b3-a3c7c6fd812e",
+   "id": "4",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -99,7 +99,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "c9994cd2-5e45-4071-ab87-b6b3e3af1174",
+   "id": "5",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -111,7 +111,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "0c42a6c6-bb45-472f-a2cb-190cdd922047",
+   "id": "6",
    "metadata": {},
    "outputs": [],
    "source": [