diff --git a/README.md b/README.md
index 4b3cca8..f7c64a6 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 <h1>Lazarus</h1>
 
-<img src="assets/banner2.png" alt="Lazarus — bring your codebase alive. A Claude Code plugin that discovers, repairs, and audits any codebase behind a deterministic guard." width="100%" />
+<img src="assets/banner2.jpg" alt="Lazarus — bring your codebase alive. A Claude Code plugin that discovers, repairs, and audits any codebase behind a deterministic guard." width="100%" />
 
 **Point Claude at any repo — Lazarus makes it run, tells you what to fix, and makes the page worth showing.**
 <br/>Nothing changes until you approve a plan. A guard blocks `rm -rf /` before it ever runs.
@@ -73,7 +73,7 @@ A `PreToolUse` hook inspects every shell command *before* it runs and refuses th
 🧟‍♂️ *IT'S ALIVE — now make the repo page prove it.* Your README is the first thing anyone checks to decide whether a project is worth their time. `gitalive` audits everything a visitor sees *before* the source — README, LICENSE, CONTRIBUTING, security policy, templates, accessibility — against **cited standards, never taste**. `gitalive-repair` fixes what you ratify, asking for facts only you own (which license? what security contact?) and running **zero shell commands**.
 
 <div align="center">
-<img src="assets/gitalive-before-after.png" alt="Before and after GitAlive: a standard just-uploaded GitHub repo page — bare file list, two-line README, empty sidebar — next to the same repo with a polished page: bold Lazarus title, hero banner, green CI badge row, table of contents, Install, Usage and FAQ sections, and a filled About sidebar" width="100%" />
+<img src="assets/gitalive-before-after.jpg" alt="Before and after GitAlive: a standard just-uploaded GitHub repo page — bare file list, two-line README, empty sidebar — next to the same repo with a polished page: bold Lazarus title, hero banner, green CI badge row, table of contents, Install, Usage and FAQ sections, and a filled About sidebar" width="100%" />
 </div>
 
 The transformation is real — GitAlive's first run on this very repo caught a CI pipeline wearing no badge, a project name living only inside a PNG, and contributor docs one plugin behind, all fixed behind the ratify gate. Deliberate choices stay quiet: waive an item once and re-runs never nag you about it.
diff --git a/assets/README.md b/assets/README.md
index 3327467..4779d1c 100644
--- a/assets/README.md
+++ b/assets/README.md
@@ -4,14 +4,14 @@ Images used by the project README and the repo's GitHub presentation.
 
 | File | Used for | Referenced from |
 |------|----------|-----------------|
-| `banner2.png` | Hero image at the top of the README | `README.md` |
+| `banner2.jpg` | Hero image at the top of the README | `README.md` |
 | `demo.svg`    | Animated "Watch it work" terminal | `README.md` |
 | `guard.png`   | Inline image in the "makes it safe to run" section | `README.md` |
-| `gitalive-before-after.png` | Before/after panel in the "GitAlive" spotlight section (generated with gpt-image-2) | `README.md` |
+| `gitalive-before-after.jpg` | Before/after panel in the "GitAlive" spotlight section (generated with gpt-image-2) | `README.md` |
 | `og-card.png` | Social-preview card (how the repo unfurls on Slack/X/etc.) | GitHub → repo **Settings → General → Social preview** (not referenced from `README.md`) |
 
 **Updating an image.** Replace the file in place and keep the same name, so the README keeps
-resolving it, then stage just that one file — e.g. `git add assets/banner2.png`. Avoid
+resolving it, then stage just that one file — e.g. `git add assets/banner2.jpg`. Avoid
 `git add assets/*` / `git add -A`, which can sweep up local scratch files (`*.local-backup.*`,
 which are git-ignored).
 
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