diff --git a/README.md b/README.md
index 0be3eeb8208..5c0373c1820 100644
--- a/README.md
+++ b/README.md
@@ -289,6 +289,13 @@ The dist-tags follow the naming convention `legacy-(version)`.
 For example, `{{ metadata['lib_install_cmd'] }}@legacy-10` installs client libraries
 for versions compatible with Node.js 10.
 
+## Post-quantum Cryptography
+
+A minimum Node version of >=22.20 is required for post-quantum cryptography to
+be used. When running an application with a supported node version and making
+requests with a client library, network traffic will automatically be secure
+against post-quantum decryption methods.
+
 ## Versioning
 
 Our libraries follow [Semantic Versioning][semver].