diff --git a/docs/maintaining/aarch64-runner.md b/docs/maintaining/aarch64-runner.md
index cd820253..45f9c9b3 100644
--- a/docs/maintaining/aarch64-runner.md
+++ b/docs/maintaining/aarch64-runner.md
@@ -2,7 +2,7 @@
 
 For building `aarch64` images, we use self-hosted GitHub runners.
 It is recommended to have at least two runners to allow better parallelism.
-Each runner is recommended to have at least _2 cores_ and _20 GB_ of disk space.
+Each runner is recommended to have at least _2 cores_ and _30 GB_ of disk space.
 
 Add a new runner: