diff --git a/.travis.yml b/.travis.yml
index f5008cf5..0c484b76 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,19 +4,11 @@ notifications:
   email: false
 node_js:
   - '8'
+  - '10'
 before_script:
   - npm prune
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/
-env:
-  - CXX=g++-4.9
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.9
 before_install:
-  - if [[ `npm -v` != 5* ]]; then npm i -g npm@latest; fi
   - sudo apt-get install libjpeg-dev libgif-dev
diff --git a/dadi/lib/controller/index.js b/dadi/lib/controller/index.js
index f939d897..17d30535 100755
--- a/dadi/lib/controller/index.js
+++ b/dadi/lib/controller/index.js
@@ -145,7 +145,7 @@ const Controller = function (router) {
 
       pattern = pattern.concat([
         parsedUrl.pathname,
-        parsedUrl.search.slice(1)
+        parsedUrl.search ? parsedUrl.search.slice(1) : null
       ])
     }
 
@@ -250,7 +250,7 @@ Controller.prototype.addCacheControlHeader = function (res, handler, domain) {
     if (!value || (value.length === 0)) return
 
     // already set
-    if (res._headers['cache-control']) return
+    if (res.getHeader('cache-control')) return
 
     // set the header
     res.setHeader('Cache-Control', value)
diff --git a/dadi/lib/handlers/image.js b/dadi/lib/handlers/image.js
index 407e4da9..fbdc735d 100644
--- a/dadi/lib/handlers/image.js
+++ b/dadi/lib/handlers/image.js
@@ -14,6 +14,8 @@ const sharp = require('sharp')
 const smartcrop = require('smartcrop-sharp')
 const urlParser = require('url')
 const Vibrant = require('node-vibrant')
+const imagemin = require('imagemin')
+const imageminJpegtran = require('imagemin-jpegtran')
 
 const StorageFactory = require(path.join(__dirname, '/../storage/factory'))
 const Cache = require(path.join(__dirname, '/../cache'))
@@ -61,7 +63,8 @@ const IMAGE_PARAMETERS = [
   { name: 'blur', aliases: ['b'] },
   { name: 'strip', aliases: ['s'] },
   { name: 'rotate', aliases: ['r'] },
-  { name: 'flip', aliases: ['fl'] }
+  { name: 'flip', aliases: ['fl'] },
+  { name: 'progressive', aliases: ['pg'], default: 'true' }
 ]
 
 /**
@@ -792,9 +795,9 @@ ImageHandler.prototype.process = function (sharpImage, imageBuffer) {
           will _not_ be preserved.
           */
           case 'fill':
+            resizeOptions.fit = 'fill'
             sharpImage = sharpImage
               .resize(width, height, resizeOptions)
-              .ignoreAspectRatio()
 
             break
 
@@ -822,7 +825,7 @@ ImageHandler.prototype.process = function (sharpImage, imageBuffer) {
               // resize if options.width or options.height are explicitly set
               if (options.width || options.height) {
                 if (options.width && options.height) {
-                  sharpImage = sharpImage.ignoreAspectRatio()
+                  resizeOptions.fit = 'fill'
                 }
 
                 if (options.devicePixelRatio && options.devicePixelRatio < 4) {
@@ -989,6 +992,10 @@ ImageHandler.prototype.process = function (sharpImage, imageBuffer) {
               processBuffer = this.processGif(buffer)
             }
 
+            if (options.progressive === 'true' && (format === 'jpeg' || format === 'jpg')) {
+              processBuffer = this.progressiveJpeg(buffer)
+            }
+
             processBuffer.then(buffer => {
               resolve(buffer)
             })
@@ -1030,6 +1037,21 @@ ImageHandler.prototype.processGif = function (buffer) {
   })
 }
 
+/**
+ * Transcodes an input buffer to a progressive JPEG
+ *
+ * @param {Buffer} buffer - a Buffer extracted from the main image
+ * processor after applying image manipulations
+ * @returns {Buffer} a progressive JPEG encoded buffer
+ */
+ImageHandler.prototype.progressiveJpeg = function (buffer) {
+  return imagemin.buffer(buffer, {
+    plugins: [
+      imageminJpegtran({progressive: true})
+    ]
+  })
+}
+
 ImageHandler.prototype.sanitiseOptions = function (options) {
   // check the options for aliases
   // e.g. "dpr" === "devicePixelRatio"
@@ -1153,7 +1175,8 @@ function getImageOptionsFromLegacyURL (optionsArray) {
     blur: optionsArray[9 + superLegacyFormatOffset],
     strip: optionsArray[10 + superLegacyFormatOffset],
     rotate: optionsArray[11 + superLegacyFormatOffset],
-    flip: optionsArray[12 + superLegacyFormatOffset]
+    flip: optionsArray[12 + superLegacyFormatOffset],
+    progressive: optionsArray[13 + superLegacyFormatOffset]
   }
 
   return options
diff --git a/package.json b/package.json
index 20e82677..6983e128 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,8 @@
     "he": "^1.1.0",
     "husky": "^1.0.1",
     "image-size-stream": "1.1.0",
+    "imagemin": "^6.0.0",
+    "imagemin-jpegtran": "^5.0.2",
     "images": "^3.0.0",
     "jimp": "^0.2.28",
     "jsonwebtoken": "^8.2.1",
diff --git a/test/acceptance/auth.js b/test/acceptance/auth.js
index a68ba527..535b2b84 100755
--- a/test/acceptance/auth.js
+++ b/test/acceptance/auth.js
@@ -62,7 +62,10 @@ describe('Authentication', function () {
         .send({pattern: 'test'})
         .set('Authorization', 'Bearer ' + token)
         .expect('content-type', 'application/json')
-        .expect(200, done)
+        .end((err, res) => {
+          res.statusCode.should.eql(200)
+          done()
+        })
     })
   })
 
diff --git a/test/acceptance/help.js b/test/acceptance/help.js
index 05d44a76..a30d3442 100755
--- a/test/acceptance/help.js
+++ b/test/acceptance/help.js
@@ -137,12 +137,20 @@ module.exports.clearCache = function () {
         if (fs.lstatSync(curPath).isDirectory()) { // recurse
           deleteFolderRecursive(curPath)
         } else { // delete file
-          fs.unlinkSync(path.resolve(curPath))
+          try {
+            fs.unlinkSync(path.resolve(curPath))
+          } catch (err) {
+
+          }
         }
       })
       fs.rmdirSync(filepath)
     } else {
-      fs.unlinkSync(filepath)
+      try {
+        fs.unlinkSync(filepath)
+      } catch (err) {
+
+      }
     }
   }
 
diff --git a/test/acceptance/visual_manifest.json b/test/acceptance/visual_manifest.json
index 3f120904..6e62968f 100644
--- a/test/acceptance/visual_manifest.json
+++ b/test/acceptance/visual_manifest.json
@@ -297,6 +297,13 @@
         "quality": "100"
       },
       "baselineFilename": "images/visual/baseline/measure.png?quality=100.png"
+    },
+    {
+      "image": "measure2.jpg",
+      "params": {
+        "progressive": true
+      },
+      "baselineFilename": "images/visual/baseline/measure2.jpg?progressive=true.jpg"
     }
   ]
 }
\ No newline at end of file
diff --git a/test/images/visual/baseline/measure2.jpg?progressive=true.jpg b/test/images/visual/baseline/measure2.jpg?progressive=true.jpg
new file mode 100644
index 00000000..f431c4e1
Binary files /dev/null and b/test/images/visual/baseline/measure2.jpg?progressive=true.jpg differ