diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d6c9d6c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+package.json text eol=lf
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 4ffd681..f423e7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 # NPM
 node_modules
 npm-debug.log
+package-lock.json
 
 # WebStorm user-specific
 .idea/workspace.xml
diff --git a/.npmignore b/.npmignore
index 33f7236..db38711 100644
--- a/.npmignore
+++ b/.npmignore
@@ -7,6 +7,7 @@
 .eslintcache
 .eslintignore
 .eslintrc.json
+.gitattributes
 .nyc_output
 .npmignore
 .travis.yml
diff --git a/.travis.yml b/.travis.yml
index 4264c75..29bb2d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: node_js
 node_js:
-  - "4"
-  - "6"
+  - "8"
 script:
   - npm run eslint
   - npm run test -- --failTaskOnError --suppressPassed
@@ -9,4 +8,4 @@ script:
 after_success:
 ## We only need to run coveralls for one node version (doesn't matter which one).
 ## We also ignore publishing failures, since restarting an existing travis build would otherwise break.
-  - if node --version | grep -q ^v6 ; npm run coverage && npm run coveralls; fi
+  - if node --version | grep -q ^v8 ; npm run coverage && npm run coveralls; fi
diff --git a/lib/writeGltf.js b/lib/writeGltf.js
index 3634889..3fadaa6 100644
--- a/lib/writeGltf.js
+++ b/lib/writeGltf.js
@@ -168,7 +168,7 @@ function writeEmbeddedTextures(gltf) {
         var textureSource = texture.source;
         var textureByteLength = textureSource.length;
 
-        image.mimeType = mime.lookup(texture.extension);
+        image.mimeType = mime.getType(texture.extension);
         image.bufferView = gltf.bufferViews.length;
         gltf.bufferViews.push({
             buffer : 0,
diff --git a/package.json b/package.json
index 585c0e5..f6e9fd1 100644
--- a/package.json
+++ b/package.json
@@ -26,17 +26,16 @@
     "node": ">=4.0.0"
   },
   "dependencies": {
-    "bluebird": "^3.5.0",
-    "cesium": "^1.36.0",
-    "fs-extra": "^4.0.1",
+    "bluebird": "^3.5.1",
+    "cesium": "^1.39.0",
+    "fs-extra": "^4.0.2",
     "jpeg-js": "^0.3.3",
-    "mime": "^1.3.6",
+    "mime": "^2.0.3",
     "pngjs": "^3.3.0",
-    "uuid": "^3.1.0",
-    "yargs": "^8.0.2"
+    "yargs": "^10.0.3"
   },
   "devDependencies": {
-    "coveralls": "^2.13.1",
+    "coveralls": "^3.0.0",
     "eslint": "^4.4.1",
     "eslint-config-cesium": "^2.0.1",
     "gulp": "^3.9.1",