diff --git a/tasks/bundle.js b/tasks/bundle.js
index b787c13f913..7c6586c1c14 100644
--- a/tasks/bundle.js
+++ b/tasks/bundle.js
@@ -51,7 +51,6 @@ tasks.push(function(cb) {
         standalone: 'Plotly',
         debug: DEV,
         compressAttrs: true,
-        packFlat: true,
         pathToMinBundle: constants.pathToPlotlyDistMin
     }, cb);
 });
@@ -68,7 +67,6 @@ tasks.push(function(cb) {
     _bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyDistWithMeta, {
         standalone: 'Plotly',
         debug: DEV,
-        packFlat: true
     }, function() {
         makeSchema(constants.pathToPlotlyDistWithMeta, constants.pathToSchema)();
         cb();
@@ -82,7 +80,6 @@ constants.partialBundlePaths.forEach(function(pathObj) {
             standalone: 'Plotly',
             debug: DEV,
             compressAttrs: true,
-            packFlat: true,
             pathToMinBundle: pathObj.distMin
         }, cb);
     });
diff --git a/tasks/cibundle.js b/tasks/cibundle.js
index f6f88ea87a5..5a2310e2295 100644
--- a/tasks/cibundle.js
+++ b/tasks/cibundle.js
@@ -17,7 +17,6 @@ _bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyBuild, {
     standalone: 'Plotly',
     debug: true,
     compressAttrs: true,
-    packFlat: true,
     pathToMinBundle: constants.pathToPlotlyDistMin
 });
 
diff --git a/tasks/util/constants.js b/tasks/util/constants.js
index 20fa44fd695..e7c97906bb4 100644
--- a/tasks/util/constants.js
+++ b/tasks/util/constants.js
@@ -86,13 +86,14 @@ module.exports = {
 
     uglifyOptions: {
         mangle: true,
-        compress: {
-            warnings: false
-        },
+        // the compress flag break mapbox-gl,
+        // TODO find a way to only skip compression on mapbox-gl files
+        compress: false,
         output: {
             beautify: false,
             ascii_only: true
         },
+
         sourceMap: false
     },