diff --git a/README.md b/README.md
index 3653076..844dbc5 100644
--- a/README.md
+++ b/README.md
@@ -4,20 +4,23 @@ A brotli "decompression bomb": a ~1 MB file on disk that expands to **50 GB** in
 The decompressed payload starts with a real PNG, so the image renders — then the browser keeps
 inflating the trailing 50 GB of zeros and runs **out of memory / crashes the tab**.
 
+A gzip version (`bomb.png.gz`) is also built, so clients that don't accept `br` still get bombed.
+
 ## Files
 
 | File | What it does |
 |------|--------------|
 | `image.png` | The real image embedded at the front of the payload (input). |
-| `create.py` | Builds the bomb: `[PNG] + 1 MB random + 50 GB zeros` → `bomb.png.br`. |
-| `bomb.png.br` | The compressed bomb (~1 MB on disk, 50 GB decompressed). |
-| `server.py` | Minimal Flask server that serves the bomb with `Content-Encoding: br`. |
+| `create.py` | Builds the bombs: `[PNG] + 1 MB random + 50 GB zeros` → `bomb.png.br` **and** `bomb.png.gz`. |
+| `bomb.png.br` | The brotli bomb (~1 MB on disk, 50 GB decompressed). |
+| `bomb.png.gz` | The gzip bomb (~50 MB on disk, 50 GB decompressed) — fallback for clients without `br`. |
+| `server.py` | Minimal Flask server. Loads both prebuilt bombs and picks `br` or `gzip` per the client's `Accept-Encoding`. |
 | `slow_download.py` | Fuller server: inline `<img>` page + download route. |
 
 ## Usage
 
 ```sh
-python create.py        # build bomb.png.br (pass --rebuild to overwrite)
+python create.py        # build bomb.png.br + bomb.png.gz (pass --rebuild to overwrite)
 python server.py        # serve on :8080, then open in a browser
 ```