diff --git a/.github/funding.yml b/.github/funding.yml
new file mode 100644
index 0000000..327bc80
--- /dev/null
+++ b/.github/funding.yml
@@ -0,0 +1,4 @@
+github: sindresorhus
+open_collective: sindresorhus
+tidelift: npm/pretty-bytes
+custom: https://sindresorhus.com/donate
diff --git a/.github/security.md b/.github/security.md
new file mode 100644
index 0000000..5358dc5
--- /dev/null
+++ b/.github/security.md
@@ -0,0 +1,3 @@
+# Security Policy
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.