diff --git a/.eleventy.js b/.eleventy.js
index f68f173..a193533 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -44,7 +44,9 @@ const { DateTime } = require("luxon");
 const { promisify } = require("util");
 const fs = require("fs");
 const hasha = require("hasha");
-const readFile = promisify(require("fs").readFile);
+const readFile = promisify(fs.readFile);
+const stat = promisify(fs.stat);
+const execFile = promisify(require("child_process").execFile);
 const pluginRss = require("@11ty/eleventy-plugin-rss");
 const pluginSyntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
 const pluginNavigation = require("@11ty/eleventy-navigation");
@@ -89,9 +91,40 @@ module.exports = function (eleventyConfig) {
       .catch((error) => callback(error));
   });
 
-  eleventyConfig.addFilter("lastModifiedDate", function (filename) {
-    const stats = fs.statSync(filename);
-    return stats.mtime; // Date
+  async function lastModifiedDate(filename) {
+    try {
+      const { stdout } = await execFile("git", [
+        "log",
+        "-1",
+        "--format=%cd",
+        filename,
+      ]);
+      return new Date(stdout);
+    } catch (e) {
+      console.error(e.message);
+      // Fallback to stat if git isn't working.
+      const stats = await stat(filename);
+      return stats.mtime; // Date
+    }
+  }
+  // Cache the lastModifiedDate call because shelling out to git is expensive.
+  // This means the lastModifiedDate will never change per single eleventy invocation.
+  const lastModifiedDateCache = new Map();
+  eleventyConfig.addNunjucksAsyncFilter("lastModifiedDate", function (
+    filename,
+    callback
+  ) {
+    const call = (result) => {
+      result.then((date) => callback(null, date));
+      result.catch((error) => callback(error));
+    };
+    const cached = lastModifiedDateCache.get(filename);
+    if (cached) {
+      return call(cached);
+    }
+    const promise = lastModifiedDate(filename);
+    lastModifiedDateCache.set(filename, promise);
+    call(promise);
   });
 
   eleventyConfig.addFilter("encodeURIComponent", function (str) {
diff --git a/_11ty/blurry-placeholder.js b/_11ty/blurry-placeholder.js
index c9a24ce..b1bc6be 100644
--- a/_11ty/blurry-placeholder.js
+++ b/_11ty/blurry-placeholder.js
@@ -109,7 +109,7 @@ module.exports = async function (src) {
                       <feFuncA type="discrete" tableValues="1 1"></feFuncA>
                     </feComponentTransfer>
                   </filter>
-                  <image filter="url(#b)" x="0" y="0"
+                  <image filter="url(#b)" preserveAspectRatio="none"
                     height="100%" width="100%"
                     xlink:href="${dataURI.src}">
                   </image>
diff --git a/_includes/layouts/base.njk b/_includes/layouts/base.njk
index 99ae89d..f0135b7 100644
--- a/_includes/layouts/base.njk
+++ b/_includes/layouts/base.njk
@@ -15,6 +15,7 @@
     <link rel="icon" href="{{ '/img/favicon/favicon-192x192.png' | addHash }}" type="image/png">
     {% endif %}
     <meta name="theme-color" content="#f9c412">
+    <meta name="robots" content="max-snippet:-1, max-image-preview: large, max-video-preview: -1">
     <title>{{ renderData.title or title or metadata.title | escape }}</title>
     <meta property="og:title" content="{{ renderData.title or title or metadata.title | escape  }}">
     {% set desc = renderData.description or description %}
diff --git a/test/test-generic-post.js b/test/test-generic-post.js
index b01ed52..bd0fba0 100644
--- a/test/test-generic-post.js
+++ b/test/test-generic-post.js
@@ -63,7 +63,8 @@ describe("check build output for a generic post", () => {
 
     it("should have script elements", () => {
       const scripts = doc.querySelectorAll("script[src]");
-      expect(scripts).to.have.length(GA_ID ? 2 : 1);
+      let has_ga_id = GA_ID ? 1 : 0;
+      expect(scripts).to.have.length(has_ga_id + 1); // NOTE: update this when adding more <script>
       expect(scripts[0].getAttribute("src")).to.match(
         /^\/js\/min\.js\?hash=\w+/
       );
@@ -168,8 +169,8 @@ describe("check build output for a generic post", () => {
         //expect(avif.type).to.equal("image/avif");
         expect(jpg.sizes).to.equal("(max-width: 608px) 100vw, 608px");
         expect(webp.sizes).to.equal("(max-width: 608px) 100vw, 608px");
-        expect(img.height).to.equal(850);
-        expect(img.width).to.equal(1280);
+        expect(img.height).to.match(/^\d+$/);
+        expect(img.width).to.match(/^\d+$/);
         expect(img.getAttribute("loading")).to.equal("lazy");
         expect(img.getAttribute("decoding")).to.equal("async");
         // JSDom fails to parse the style attribute properly