diff --git a/public/index.html b/public/index.html
index 15f20a9..d885663 100644
--- a/public/index.html
+++ b/public/index.html
@@ -22,9 +22,9 @@
   <meta name="twitter:title" content="MeshCore Analyzer">
   <meta name="twitter:description" content="Real-time MeshCore LoRa mesh network analyzer — live packet visualization, node tracking, channel decryption, and route analysis.">
   <meta name="twitter:image" content="https://raw.githubusercontent.com/Kpa-clawbot/meshcore-analyzer/master/public/og-image.png">
-  <link rel="stylesheet" href="style.css?v=1774630476">
-  <link rel="stylesheet" href="home.css?v=1774630476">
-  <link rel="stylesheet" href="live.css?v=1774630476">
+  <link rel="stylesheet" href="style.css?v=1774631638">
+  <link rel="stylesheet" href="home.css?v=1774631638">
+  <link rel="stylesheet" href="live.css?v=1774631638">
   <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
     integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
     crossorigin="anonymous">
@@ -81,29 +81,29 @@
   <main id="app" role="main"></main>
 
   <script src="vendor/qrcode.js"></script>
-  <script src="roles.js?v=1774630476"></script>
-  <script src="customize.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="region-filter.js?v=1774630476"></script>
-  <script src="hop-resolver.js?v=1774630476"></script>
-  <script src="hop-display.js?v=1774630476"></script>
-  <script src="app.js?v=1774630476"></script>
-  <script src="home.js?v=1774630476"></script>
-  <script src="packet-filter.js?v=1774630476"></script>
-  <script src="packets.js?v=1774630476"></script>
-  <script src="map.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="channels.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="nodes.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="traces.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="analytics.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-v1-constellation.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-v2-constellation.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-lab.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="live.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observers.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observer-detail.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="compare.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="node-analytics.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="perf.js?v=1774630476" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="roles.js?v=1774631638"></script>
+  <script src="customize.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="region-filter.js?v=1774631638"></script>
+  <script src="hop-resolver.js?v=1774631638"></script>
+  <script src="hop-display.js?v=1774631638"></script>
+  <script src="app.js?v=1774631638"></script>
+  <script src="home.js?v=1774631638"></script>
+  <script src="packet-filter.js?v=1774631638"></script>
+  <script src="packets.js?v=1774631638"></script>
+  <script src="map.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="channels.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="nodes.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="traces.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="analytics.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-v1-constellation.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-v2-constellation.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-lab.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="live.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observers.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observer-detail.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="compare.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="node-analytics.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="perf.js?v=1774631638" onerror="console.error('Failed to load:', this.src)"></script>
 </body>
 </html>
diff --git a/public/style.css b/public/style.css
index cb7cf9a..d05bf15 100644
--- a/public/style.css
+++ b/public/style.css
@@ -171,6 +171,12 @@ a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible
   padding: 1px 5px; border-radius: var(--badge-radius);
   letter-spacing: 0.5px;
 }
+.nav-stats .version-badge a {
+  color: var(--nav-text-muted); text-decoration: none;
+}
+.nav-stats .version-badge a:hover {
+  color: var(--nav-text); text-decoration: underline;
+}
 
 /* === Layout === */
 #app { height: calc(100vh - 52px); height: calc(100dvh - 52px); overflow: hidden; }
diff --git a/test-frontend-helpers.js b/test-frontend-helpers.js
index 02ec51e..7a6e5d4 100644
--- a/test-frontend-helpers.js
+++ b/test-frontend-helpers.js
@@ -1271,6 +1271,22 @@ console.log('\n=== app.js: formatVersionBadge ===');
   });
 }
 
+// ===== CSS: version-badge link contrast (issue #139) =====
+console.log('\n=== style.css: version-badge link contrast ===');
+{
+  const cssContent = fs.readFileSync(__dirname + '/public/style.css', 'utf8');
+  test('version-badge a has explicit color', () => {
+    assert.ok(cssContent.includes('.version-badge a'), 'should have .version-badge a rule');
+    assert.ok(/\.version-badge a\s*\{[^}]*color:\s*var\(--nav-text-muted\)/.test(cssContent),
+      'link color should use var(--nav-text-muted)');
+  });
+  test('version-badge a has hover state', () => {
+    assert.ok(cssContent.includes('.version-badge a:hover'), 'should have .version-badge a:hover rule');
+    assert.ok(/\.version-badge a:hover\s*\{[^}]*color:\s*var\(--nav-text\)/.test(cssContent),
+      'hover color should use var(--nav-text)');
+  });
+}
+
 // ===== SUMMARY =====
 console.log(`\n${'═'.repeat(40)}`);
 console.log(`  Frontend helpers: ${passed} passed, ${failed} failed`);