diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4cc6d0bd..512b05f4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## v2.5.2-dev
 
+### Backwards incompatible changes
+
+* Require OTP 24 or later. Hex 2.4.2 to 2.5.1 can't unpack packages on OTP 22, so Hex 2.4.1 is the last release that works there. Hex 2.5.1 is the last release for OTP 23
+
 ### Enhancements
 
 * Print warnings to standard error instead of standard output, keeping stdout clean for machine-readable output such as `mix hex.outdated --json`. Warning-colored lines that are part of a command's regular output, such as retirement notices in `mix hex.info` and the `mix deps.get` dependency listing, remain on standard output
diff --git a/RELEASE.md b/RELEASE.md
index bd878da8..0839eab2 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -34,6 +34,8 @@ Hex needs to built for every Elixir supported vMAJOR.MINOR version. Currently th
 
 Always build on the latest patch version and make sure tests pass before building the archive.
 
+Only build on OTP versions that CI tests. Archives don't load on an OTP version older than the one they were built on, and the old CSV format used for Elixir v1.12-v1.16 has no OTP column, so the OTP version used for those archives is the minimum OTP version Hex supports on that Elixir version.
+
 ## Places where version is mentioned
 
 * mix.exs `@version` attribute
diff --git a/scripts/release_hex.sh b/scripts/release_hex.sh
index 56107bb7..cfc4618b 100755
--- a/scripts/release_hex.sh
+++ b/scripts/release_hex.sh
@@ -47,9 +47,9 @@ function main {
   # UPDATE THIS FOR EVERY RELEASE, ORDER MATTERS
 
   # Elixir v1.12-v1.16 (old CSV format)
-  build_old ${hex_version} 22.3      1.12.3 1.12.0 xenial-20200212
-  build_old ${hex_version} 22.3      1.13.4 1.13.0 xenial-20200212
-  build_old ${hex_version} 23.3      1.14.2 1.14.0 xenial-20210114
+  build_old ${hex_version} 24.3.4.17 1.12.3 1.12.0 focal-20240427
+  build_old ${hex_version} 24.3.4.17 1.13.4 1.13.0 focal-20240427
+  build_old ${hex_version} 24.3.4.17 1.14.2 1.14.0 focal-20250404
   build_old ${hex_version} 24.3.4.17 1.15.8 1.15.0 focal-20240427
   build_old ${hex_version} 24.3.4.17 1.16.3 1.16.0 focal-20240427