diff --git a/build-bookmarklet.sh b/build-bookmarklet.sh
index 24cd402..b0bc38b 100755
--- a/build-bookmarklet.sh
+++ b/build-bookmarklet.sh
@@ -26,13 +26,14 @@ if [ ! -f "$CSS_FILE" ]; then echo "ERROR: $CSS_FILE not found"; exit 1; fi
 if [ ! -f "$JS_FILE" ]; then echo "ERROR: $JS_FILE not found"; exit 1; fi
 if [ ! -f "$FAVICON_FILE" ]; then echo "ERROR: $FAVICON_FILE not found"; exit 1; fi
 
-# Favicon URL (served from GitHub raw)
-FAVICON_URL="https://raw.githubusercontent.com/TauNeutrino/kantine-overview/main/favicon.png"
+# Generate favicon Base64 data URI from PNG
+FAVICON_B64=$(base64 -w0 "$FAVICON_FILE")
+FAVICON_URL="data:image/png;base64,${FAVICON_B64}"
 
 CSS_CONTENT=$(cat "$CSS_FILE")
 
-# Inject version into JS
-JS_CONTENT=$(cat "$JS_FILE" | sed "s|{{VERSION}}|$VERSION|g")
+# Inject version and favicon into JS
+JS_CONTENT=$(cat "$JS_FILE" | sed "s|{{VERSION}}|$VERSION|g" | sed "s|{{FAVICON_DATA_URI}}|$FAVICON_URL|g")
 
 # === 1. Build standalone HTML (for local testing/dev) ===
 cat > "$DIST_DIR/kantine-standalone.html" << HTMLEOF
@@ -206,9 +207,9 @@ echo "document.getElementById('bookmarklet-link').href = " >> "$DIST_DIR/install
 echo "$JS_CONTENT" | python3 -c "
 import sys, json, urllib.parse
 
-# 1. Read JS and Replace VERSION
+# 1. Read JS and Replace VERSION + Favicon
 js_template = sys.stdin.read()
-js = js_template.replace('{{VERSION}}', '$VERSION')
+js = js_template.replace('{{VERSION}}', '$VERSION').replace('{{FAVICON_DATA_URI}}', '$FAVICON_URL')
 
 # 2. Prepare CSS for injection via createElement('style')
 css = open('$CSS_FILE').read().replace('\n', ' ').replace('  ', ' ')
diff --git a/changelog.md b/changelog.md
index 64ba8aa..d82c52e 100755
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,6 @@
+## v1.4.27
+- 🔧 **Build**: Favicon wird jetzt sauber aus `favicon.png` per Build-Script als PNG-Base64-Data-URI generiert und über `{{FAVICON_DATA_URI}}` Platzhalter in `kantine.js` + `install.html` injiziert. Funktioniert auf allen Browsern und Proxy-Diensten.
+
 ## v1.4.26
 - 🎨 **Favicon**: Von SVG-Base64 auf PNG-Datei (`favicon.png`) umgestellt, verlinkt via raw.githubusercontent.com. Funktioniert zuverlässig auf allen Browsern und Proxy-Diensten (htmlpreview.github.io).
 
diff --git a/kantine.js b/kantine.js
index 661cce5..44d888e 100755
--- a/kantine.js
+++ b/kantine.js
@@ -57,7 +57,7 @@
         const favicon = document.createElement('link');
         favicon.rel = 'icon';
         favicon.type = 'image/png';
-        favicon.href = 'https://raw.githubusercontent.com/TauNeutrino/kantine-overview/main/favicon.png';
+        favicon.href = '{{FAVICON_DATA_URI}}';
         document.head.appendChild(favicon);
 
         // Inject Google Fonts if not already present
diff --git a/version.txt b/version.txt
index 48259a7..fd51d23 100755
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-v1.4.26
+v1.4.27