diff --git a/src/WorkerPool.js b/src/WorkerPool.js
index ba4bd72..44b202d 100644
--- a/src/WorkerPool.js
+++ b/src/WorkerPool.js
@@ -231,6 +231,33 @@ class PoolWorker {
             ],
           });
         });
+
+        finalCallback();
+        break;
+      }
+    case 'importModule':
+      {
+        const {
+          request,
+          options,
+          questionId
+        } = message;
+        const {
+          data
+        } = this.jobs[id];
+        data.importModule(request, options)
+          .then(result => this.writeJson({
+            type: 'result',
+            id: questionId,
+            error: null,
+            result
+          }))
+          .catch(error => this.writeJson({
+            type: 'result',
+            id: questionId,
+            error
+          }));
+
         finalCallback();
         break;
       }
diff --git a/src/index.js b/src/index.js
index a5de5be..66e4ffa 100644
--- a/src/index.js
+++ b/src/index.js
@@ -37,12 +37,14 @@ function pitch() {
             this._compilation.options.devtool,
         },
       },
+      mode: this.mode,
       resourcePath: this.resourcePath,
       resource: this.resourcePath + (this.resourceQuery || ''),
       sourceMap: this.sourceMap,
       emitError: this.emitError,
       emitWarning: this.emitWarning,
       loadModule: this.loadModule,
+      importModule: this.importModule,
       resolve: this.resolve,
       getResolve: this.getResolve,
       target: this.target,
diff --git a/src/worker.js b/src/worker.js
index 7fe3d95..1010edf 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -141,6 +141,26 @@ const queue = asyncQueue(({ id, data }, taskCallback) => {
             });
             nextQuestionId += 1;
           },
+          importModule: (request, options) => {
+            const promise = new Promise((resolve, reject) => {
+              callbackMap[nextQuestionId] = (error, result) => {
+                if (error) {
+                  reject(error);
+                } else {
+                  resolve(result);
+                }
+              };
+            });
+            writeJson({
+              type: 'importModule',
+              id,
+              questionId: nextQuestionId,
+              request,
+              options
+            });
+            nextQuestionId += 1;
+            return promise;
+          },
           resolve: (context, request, callback) => {
             resolveWithOptions(context, request, callback);
           },
@@ -244,6 +264,7 @@ const queue = asyncQueue(({ id, data }, taskCallback) => {
           sourceMap: data.sourceMap,
           target: data.target,
           minimize: data.minimize,
+          mode: data.mode,
           resourceQuery: data.resourceQuery,
           rootContext: data.rootContext,
           // eslint-disable-next-line no-underscore-dangle