diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 01f98df..499d3b1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.4.0
+    rev: v4.0.1
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -10,7 +10,7 @@ repos:
     -   id: check-added-large-files
 
 -  repo: https://github.com/frnmst/md-toc
-   rev: '7.2.0'  # or a specific git tag from md-toc
+   rev: '8.0.0'  # or a specific git tag from md-toc
    hooks:
    -    id: md-toc
         args: [-p, 'github', '-l6']  # CLI options
diff --git a/Pipfile b/Pipfile
index ffe1e55..6559b7f 100644
--- a/Pipfile
+++ b/Pipfile
@@ -6,7 +6,7 @@ name = "pypi"
 [packages]
 
 [dev-packages]
-pre-commit = '~=2.12'
+pre-commit = '~=2.13'
 
 [requires]
-python_version = "3.9"
+python_version = "*"
diff --git a/donations.md b/donations.md
new file mode 100644
index 0000000..73576ef
--- /dev/null
+++ b/donations.md
@@ -0,0 +1,9 @@
+## Crypto donations
+
+- Bitcoin: bc1qnkflazapw3hjupawj0lm39dh9xt88s7zal5mwu
+- Dogecoin: DMB5h2GhHiTNW7EcmDnqkYpKs6Da2wK3zP
+- Vertcoin: vtc1qd8n3jvkd2vwrr6cpejkd9wavp4ld6xfu9hkhh0
+
+## Other
+
+- https://buymeacoff.ee/frnmst