diff --git a/README.md b/README.md
index ed8c7a5bf6..576b85bacc 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,21 @@ bun remove react
 bun add preact
 ```
 
+<detail>
+
+<summary>**For Linux users**: `bun install` needs Linux Kernel 5.6</summary> or higher to work well. The minimum is 5.1. If you're on Linux kernel 5.1 - 5.5, `bun install` should still work, but HTTP requests will be slow due to lack of support for io_uring's `connect()` operation.
+
+If you're using Ubuntu 20.04, here's how to install a [newer kernel](https://wiki.ubuntu.com/Kernel/LTSEnablementStack):
+
+```bash
+# If this returns a version >= 5.6, you don't need to do anything
+uname -r
+
+sudo apt install --install-recommends linux-generic-hwe-20.04
+```
+
+</detail>
+
 ## Using bun as a task runner
 
 Instead of waiting 170ms for your npm client to start for each task, you wait 6ms for bun.