diff --git a/front/src/views/rule.html b/front/src/views/rule.html
index ded0da4..e8df0cd 100644
--- a/front/src/views/rule.html
+++ b/front/src/views/rule.html
@@ -225,6 +225,26 @@
         </div>
     </div>
 
+    <div ng-if="policyName === 'gzipCompression'">
+        <h3 ng-if="rule.value > 0">{{rule.value | bytes}} could be saved on <ng-pluralize count="rule.offendersObj.list.images.length" when="{'one': '1 file', 'other': '{} files'}"></ng-pluralize></h3>
+        <div class="table">
+            <div class="headers">
+                <div>File</div>
+                <div>Current weight</div>
+                <div>Gzipped</div>
+                <div>Gain</div>
+            </div>
+            <div ng-repeat="file in rule.offendersObj.list.files | orderBy:'-gain'">
+                <div>
+                    <url-link url="file.url" max-length="70"></url-link>
+                </div>
+                <div>{{file.original | bytes}}</div>
+                <div>{{file.gzipped | bytes}}</div>
+                <div><b>-{{file.gain | bytes}}</b></div>
+            </div>
+        </div>
+    </div>
+
     <div ng-if="policyName === 'fileMinification'">
         <h3 ng-if="rule.value > 0">{{rule.value | bytes}} could be saved on <ng-pluralize count="rule.offendersObj.list.files.length" when="{'one': '1 file', 'other': '{} files'}"></ng-pluralize></h3>
         <div class="table">
diff --git a/lib/metadata/policies.js b/lib/metadata/policies.js
index eda9cc2..b785c47 100644
--- a/lib/metadata/policies.js
+++ b/lib/metadata/policies.js
@@ -866,9 +866,9 @@ var policies = {
         "tool": "weightChecker",
         "label": "Image optimization",
         "message": "<p>This metric mesures the number of bytes that could be saved by optimizing images.</p><p>Image optimization is generally one of the easiest way to reduce a page weight, and as a result, the page load time. Don't use Photoshop or other image editing tools, they're not very good for optimization. Use specialized tools such as <a href=\"https://kraken.io/\" target=\"_blank\">Kraken.io</a> or the excellent <a href=\"https://imageoptim.com/\" target=\"_blank\">ImageOption</a> on Mac. For SVG images, you can use <a href=\"https://jakearchibald.github.io/svgomg/\" target=\"_blank\">SVGOMG</a></p><p>The tools in use in YellowLabTools are not set to their maximum optimization power, so you might be able to compress even more!</p>",
-        "isOkThreshold": 30720,
+        "isOkThreshold": 10240,
         "isBadThreshold": 122880,
-        "isAbnormalThreshold": 409600,
+        "isAbnormalThreshold": 307200,
         "hasOffenders": true,
         "unit": 'bytes'
     },
@@ -876,7 +876,7 @@ var policies = {
         "tool": "weightChecker",
         "label": "Gzip compression",
         "message": "<p>Mesures the number of bytes that could be saved by compressing file transfers.</p><p>Gzip is a powerfull weight reducer and should be enabled on text-based assets in your server's configuration. Note that gzipping small files (< 1 KB) is arguable, and that some assets such as images should not be gzipped as they are already compressed. <a href=\"https://gist.github.com/gmetais/971ce13a1fbeebd88445\" target=\"_blank\">Here</a> is a list of Content-Types that should be gzipped.</p>",
-        "isOkThreshold": 20480,
+        "isOkThreshold": 5125,
         "isBadThreshold": 81920,
         "isAbnormalThreshold": 153600,
         "hasOffenders": true,
@@ -886,8 +886,8 @@ var policies = {
         "tool": "weightChecker",
         "label": "File minification",
         "message": "<p>This is the weight that could be saved if all text resources were correctly minified.</p><p>The tools in use here are <b>UglifyJS</b>, <b>clean-css</b> and <b>HTMLMinifier</b>. These tools are so good that some of your minified files can be marked as unminified. Change your tool it this happens :)</p><p>The gains of minification are generally small, but the impact can be high when these text files are loaded on the critical path.</p>",
-        "isOkThreshold": 10240,
-        "isBadThreshold": 76800,
+        "isOkThreshold": 5125,
+        "isBadThreshold": 61440,
         "isAbnormalThreshold": 122880,
         "hasOffenders": true,
         "unit": 'bytes'
diff --git a/lib/tools/weightChecker/fileMinifier.js b/lib/tools/weightChecker/fileMinifier.js
index 8e5124a..4f87476 100644
--- a/lib/tools/weightChecker/fileMinifier.js
+++ b/lib/tools/weightChecker/fileMinifier.js
@@ -121,7 +121,7 @@ var FileMinifier = function() {
             });
 
         } else {
-            debug('File type %s is not an (optimizable) image', entry.contentType);
+            debug('Not minfiable type or already minified');
             deferred.resolve(entry);
         }
 
diff --git a/lib/tools/weightChecker/gzipCompressor.js b/lib/tools/weightChecker/gzipCompressor.js
index 9981391..795cb47 100644
--- a/lib/tools/weightChecker/gzipCompressor.js
+++ b/lib/tools/weightChecker/gzipCompressor.js
@@ -41,6 +41,7 @@ var GzipCompressor = function() {
                 }
             });
         } else {
+            
             deferred.resolve(entry);
         }
 
diff --git a/lib/tools/weightChecker/imageOptimizer.js b/lib/tools/weightChecker/imageOptimizer.js
index a0b90d5..fcff06a 100644
--- a/lib/tools/weightChecker/imageOptimizer.js
+++ b/lib/tools/weightChecker/imageOptimizer.js
@@ -143,7 +143,7 @@ var ImageOptimizer = function() {
             });
 
         } else {
-            debug('File type %s is not an (optimizable) image', entry.contentType);
+            debug('File type %s is not an optimizable image', entry.contentType);
             deferred.resolve(entry);
         }
 
@@ -167,7 +167,7 @@ var ImageOptimizer = function() {
     }
 
     function isSVG(entry) {
-        return entry.isImage && entry.contentType === 'image/svg+xml';
+        return entry.isImage && entry.isSVG;
     }
 
     function compressJpegLosslessly(imageBody) {