diff --git a/packages/esbuild/readme.md b/packages/esbuild/readme.md
index 1bd97b534..847a7b47c 100644
--- a/packages/esbuild/readme.md
+++ b/packages/esbuild/readme.md
@@ -162,6 +162,16 @@ This package is fully typed with [TypeScript][].
 It exports the additional type [`Options`][api-options].
 See [§ Types][types] on our website for information.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/esbuild@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/loader/readme.md b/packages/loader/readme.md
index 818c8b379..8f5c4843f 100644
--- a/packages/loader/readme.md
+++ b/packages/loader/readme.md
@@ -138,6 +138,16 @@ This package is fully typed with [TypeScript][].
 It exports the additional type [`Options`][api-options].
 See [§ Types][types] on our website for information.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/loader@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/mdx/readme.md b/packages/mdx/readme.md
index 8c645d4a2..af6ea2e81 100644
--- a/packages/mdx/readme.md
+++ b/packages/mdx/readme.md
@@ -1142,6 +1142,16 @@ Finally, The output is serialized JavaScript.
 That final step is done by [astring][], a
 small and fast JS generator.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/mdx@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/node-loader/readme.md b/packages/node-loader/readme.md
index 7f04a5eaf..b3ac33e2f 100644
--- a/packages/node-loader/readme.md
+++ b/packages/node-loader/readme.md
@@ -146,6 +146,16 @@ This package is fully typed with [TypeScript][].
 It exports the additional type [`Options`][api-options].
 See [§ Types][types] on our website for information.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/node-loader@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/preact/readme.md b/packages/preact/readme.md
index 3abd3a246..90387cdbf 100644
--- a/packages/preact/readme.md
+++ b/packages/preact/readme.md
@@ -172,6 +172,16 @@ For types to work, make sure the TypeScript `JSX` namespace is typed.
 This is done by installing and using the types of your framework, as in
 [`preact`](https://github.com/preactjs/preact).
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/preact@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/react/readme.md b/packages/react/readme.md
index 6093148cd..c231ab229 100644
--- a/packages/react/readme.md
+++ b/packages/react/readme.md
@@ -172,6 +172,16 @@ For types to work, make sure the TypeScript `JSX` namespace is typed.
 This is done by installing and using the types of your framework, as in
 [`@types/react`](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react).
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/react@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/register/readme.md b/packages/register/readme.md
index 1870bf515..fb2034a1f 100644
--- a/packages/register/readme.md
+++ b/packages/register/readme.md
@@ -124,6 +124,16 @@ That means `import` (and `export … from`) are not supported when requiring
 This package is not typed as [TypeScript][] seems to not support `.cjs` files
 yet.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/register@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/remark-mdx/readme.md b/packages/remark-mdx/readme.md
index ef5d91647..72c88eabb 100644
--- a/packages/remark-mdx/readme.md
+++ b/packages/remark-mdx/readme.md
@@ -217,6 +217,16 @@ function myRemarkPlugin() {
 }
 ```
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `remark-mdx@^2`, compatible
+with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/rollup/readme.md b/packages/rollup/readme.md
index 6f05596a8..ba624a011 100644
--- a/packages/rollup/readme.md
+++ b/packages/rollup/readme.md
@@ -144,6 +144,16 @@ This package is fully typed with [TypeScript][].
 It exports the additional type [`Options`][api-options].
 See [§ Types][types] on our website for information.
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/rollup@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.
diff --git a/packages/vue/readme.md b/packages/vue/readme.md
index 39e820f1a..edd7c76ee 100644
--- a/packages/vue/readme.md
+++ b/packages/vue/readme.md
@@ -141,6 +141,16 @@ For types to work, make sure the TypeScript `JSX` namespace is typed.
 This is done by installing and using the types of your framework, as in
 [`vue`](https://github.com/vuejs/core).
 
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `@mdx-js/vue@^2`,
+compatible with Node.js 12.
+
 ## Security
 
 See [§ Security][security] on our website for information.