diff --git a/src/rewriter.test.ts b/src/rewriter.test.ts
index 7620094..65a54f4 100644
--- a/src/rewriter.test.ts
+++ b/src/rewriter.test.ts
@@ -107,4 +107,14 @@ describe("HTMLRewriter integration", () => {
     expect(resp.headers.get("content-security-policy")).toBeNull();
     expect(resp.headers.get("access-control-allow-origin")).toBe("*");
   });
+
+  it("rewrites data-src attributes for lazy-loaded images", async () => {
+    const resp = await worker.fetch("/browse/https://www.wired.com");
+    if (resp.status !== 200) return;
+    const html = await resp.text();
+    const dataSrcMatches = html.match(/data-src="([^"]*)"/g) || [];
+    if (dataSrcMatches.length === 0) return; // skip if wired changed their pattern
+    const allProxied = dataSrcMatches.every((m) => m.includes("/browse/"));
+    expect(allProxied).toBe(true);
+  });
 });
diff --git a/src/rewriter.ts b/src/rewriter.ts
index 9917f1e..e654b2c 100644
--- a/src/rewriter.ts
+++ b/src/rewriter.ts
@@ -59,10 +59,13 @@ class URLRewriter implements HTMLRewriterElementContentHandlers {
 }
 
 class SrcsetRewriter implements HTMLRewriterElementContentHandlers {
-  constructor(private baseUrl: string) {}
+  constructor(
+    private baseUrl: string,
+    private attr: string = "srcset",
+  ) {}
 
   element(el: Element) {
-    const srcset = el.getAttribute("srcset");
+    const srcset = el.getAttribute(this.attr);
     if (!srcset) return;
     const rewritten = srcset
       .split(",")
@@ -74,7 +77,7 @@ class SrcsetRewriter implements HTMLRewriterElementContentHandlers {
         return parts.join(" ");
       })
       .join(", ");
-    el.setAttribute("srcset", rewritten);
+    el.setAttribute(this.attr, rewritten);
   }
 }
 
@@ -108,7 +111,9 @@ export function buildRewriter(targetUrl: string): HTMLRewriter {
     .on("meta", new MetaCSPRemover())
     .on("a, area", new URLRewriter(targetUrl, "href"))
     .on("img", new URLRewriter(targetUrl, "src"))
+    .on("img, source", new URLRewriter(targetUrl, "data-src"))
     .on("img, source", new SrcsetRewriter(targetUrl))
+    .on("img, source", new SrcsetRewriter(targetUrl, "data-srcset"))
     .on("video", new URLRewriter(targetUrl, "src"))
     .on("video", new URLRewriter(targetUrl, "poster"))
     .on("audio", new URLRewriter(targetUrl, "src"))