diff --git a/lib/millstone.js b/lib/millstone.js
index 01a59cf..7d35011 100644
--- a/lib/millstone.js
+++ b/lib/millstone.js
@@ -315,7 +315,7 @@ function guessExtension(headers) {
         if (headers['content-type'].indexOf('subtype=gml') != -1) {
             return '.gml'; // avoid .xml being detected for gml
         }
-        var ext_no_dot = mime.extension(headers['content-type'].split(';')[0]);
+        var ext_no_dot = mime.getExtension(headers['content-type'].split(';')[0]);
         var ext = '.'+ext_no_dot;
         if (isValidExt(ext)) {
             return ext;
diff --git a/package.json b/package.json
index cc93ed4..f668b4f 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
         "srs": "1.x",
         "zipfile": "~0.5.5",
         "sqlite3": "2.x || 3.x",
-        "mime": "~1.2.11",
+        "mime": "^2.0.3",
         "mkdirp": "~0.5.0",
         "optimist": "~0.6.1"
     },