diff --git a/tasks/bundle.mjs b/tasks/bundle.mjs
index 84b6bda0721..5ff76c5df68 100644
--- a/tasks/bundle.mjs
+++ b/tasks/bundle.mjs
@@ -34,9 +34,18 @@ var tasks = [];
 // Bundle plotly.js
 tasks.push(function(done) {
     _bundle(pathToPlotlyIndex, pathToPlotlyDist, {
-        pathToMinBundle: pathToPlotlyDistMin
     }, function() {
         prependFile.sync(pathToPlotlyDist, header, common.throwOnError);
+
+        done();
+    });
+});
+
+// Bundle plotly.min.js
+tasks.push(function(done) {
+    _bundle(pathToPlotlyIndex, pathToPlotlyDistMin, {
+        minify: true,
+    }, function() {
         prependFile.sync(pathToPlotlyDistMin, header, common.throwOnError);
 
         done();
@@ -46,9 +55,18 @@ tasks.push(function(done) {
 // Bundle plotly.js-strict
 tasks.push(function(done) {
     _bundle(pathToPlotlyStrict, pathToPlotlyStrictDist, {
-        pathToMinBundle: pathToPlotlyStrictDistMin
     }, function() {
         prependFile.sync(pathToPlotlyStrictDist, header.replace('plotly.js', 'plotly.js (strict)'), common.throwOnError);
+
+        done();
+    });
+});
+
+// Bundle plotly.min.js-strict
+tasks.push(function(done) {
+    _bundle(pathToPlotlyStrict, pathToPlotlyStrictDistMin, {
+        minify: true,
+    }, function() {
         prependFile.sync(pathToPlotlyStrictDistMin, header.replace('plotly.js', 'plotly.js (strict - minified)'), common.throwOnError);
 
         done();
diff --git a/tasks/cibundle.mjs b/tasks/cibundle.mjs
index 4074ba3a263..f0d8761634c 100644
--- a/tasks/cibundle.mjs
+++ b/tasks/cibundle.mjs
@@ -1,3 +1,4 @@
+import runSeries from 'run-series';
 import constants from './util/constants.js';
 import _bundle from './util/bundle_wrapper.mjs';
 
@@ -11,14 +12,33 @@ import _bundle from './util/bundle_wrapper.mjs';
  *  - plotly.min.js bundle in build/ (for minified_bundle test)
  */
 
-// Bundle plotly.js and plotly.min.js
-_bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyBuild, {
-    noCompressAttributes: true,
-    pathToMinBundle: constants.pathToPlotlyBuildMin
-}, function() {
-    // Bundle the geo assets
+// list of tasks to pass to run-series to not blow up
+// memory consumption.
+var tasks = [];
+
+// Bundle plotly.js
+tasks.push(function(done) {
+    _bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyBuild, {
+        noCompressAttributes: true,
+    }, done)
+});
+
+// Bundle plotly.min.js
+tasks.push(function(done) {
+    _bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyBuildMin, {
+        minify: true,
+        noCompressAttributes: true,
+    }, done)
+});
+
+// Bundle the geo assets
+tasks.push(function(done) {
     _bundle(constants.pathToPlotlyGeoAssetsSrc, constants.pathToPlotlyGeoAssetsDist, {
         noPlugins: true,
         standalone: 'PlotlyGeoAssets'
-    });
+    }, done)
+});
+
+runSeries(tasks, function(err) {
+    if(err) throw err;
 });
diff --git a/tasks/partial_bundle.mjs b/tasks/partial_bundle.mjs
index c51a4acbae4..9f8b868eb97 100644
--- a/tasks/partial_bundle.mjs
+++ b/tasks/partial_bundle.mjs
@@ -55,15 +55,27 @@ export default function partialBundle(tasks, opts) {
 
     tasks.push(function(done) {
         var bundleOpts = {
-            deleteIndex: deleteIndex,
-            pathToMinBundle: distMin
+            deleteIndex: deleteIndex && !distMin,
         };
 
         _bundle(index, dist, bundleOpts, function() {
             var headerDist = header.replace('plotly.js', 'plotly.js (' + name + ')');
-            var headerDistMin = header.replace('plotly.js', 'plotly.js (' + name + ' - minified)');
 
             if(dist) prependFile.sync(dist, headerDist, common.throwOnError);
+
+            done();
+        });
+    });
+
+    tasks.push(function(done) {
+        var bundleOpts = {
+            deleteIndex: deleteIndex,
+            minify: true,
+        };
+
+        _bundle(index, distMin, bundleOpts, function() {
+            var headerDistMin = header.replace('plotly.js', 'plotly.js (' + name + ' - minified)');
+
             if(distMin) prependFile.sync(distMin, headerDistMin, common.throwOnError);
 
             done();
diff --git a/tasks/util/bundle_wrapper.mjs b/tasks/util/bundle_wrapper.mjs
index 39b2a804620..3955735aa87 100644
--- a/tasks/util/bundle_wrapper.mjs
+++ b/tasks/util/bundle_wrapper.mjs
@@ -15,11 +15,9 @@ var basePlugins = esbuildConfig.plugins;
  *  Bundle options:
  *  - standalone {string}
  *  Additional option:
- *  - pathToMinBundle {string} path to destination minified bundle
  *  - noCompressAttributes {boolean} skip attribute meta compression?
  * @param {function} cb callback
  *
- * Outputs one bundle (un-minified) file if opts.pathToMinBundle is omitted.
  * Otherwise outputs two file: one un-minified bundle and one minified bundle.
  *
  * Logs basename of bundle when completed.
@@ -30,28 +28,15 @@ export default async function _bundle(pathToIndex, pathToBundle, opts, cb) {
     var config = {...esbuildConfig};
 
     config.entryPoints = [pathToIndex];
-    config.outfile = pathToBundle || pathToMinBundle;
+    config.outfile = pathToBundle;
+    config.minify = !!opts.minify;
+
     if(!opts.noCompressAttributes) {
         config.plugins = basePlugins.concat([browserifyAdapter(transform)]);
     }
 
     if(opts.noPlugins) config.plugins = [];
-    var pathToMinBundle = opts.pathToMinBundle;
-    var pending = (pathToMinBundle && pathToBundle) ? 2 : 1;
-
-    config.minify = !!(pathToMinBundle && pending === 1);
-    config.outfile = pathToBundle || pathToMinBundle;
-    config.sourcemap = false;
-    build(config).then(function() {
-        if(pending === 2) {
-            config.minify = true;
-            config.outfile = pathToMinBundle;
-            // config.sourcemap = true;
-            build(config).then(function() {
-                if(cb) cb();
-            });
-        } else {
-            if(cb) cb();
-        }
-    });
+
+    await build(config);
+    if(cb) cb();
 }