diff --git a/lib/formatter.ts b/lib/formatter.ts
index d9b766d..2acd455 100644
--- a/lib/formatter.ts
+++ b/lib/formatter.ts
@@ -18,7 +18,7 @@ class LanguageServiceHost implements ts.LanguageServiceHost {
     getDefaultLibFileName = (_options: ts.CompilerOptions) => "lib";
 }
 
-export default function format(fileName: string, text: string, options = createDefaultFormatCodeSettings()) {
+export function format(fileName: string, text: string, options = createDefaultFormatCodeSettings()) {
     const host = new LanguageServiceHost();
     host.addFile(fileName, text);
 
diff --git a/lib/index.ts b/lib/index.ts
index 5979f31..bf45b30 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,5 +1,5 @@
 import * as ts from "typescript";
-import formatter from "./formatter";
+import { format } from "./formatter";
 import { createDefaultFormatCodeSettings, parseJSON } from "./utils";
 
 export { parseJSON };
@@ -7,11 +7,11 @@ export { parseJSON };
 import * as fs from "fs";
 import * as path from "path";
 
-import base from "./provider/base";
-import tsconfigjson from "./provider/tsconfigjson";
-import editorconfig, { postProcess as editorconfigPostProcess } from "./provider/editorconfig";
-import tslintjson, { postProcess as tslintPostProcess } from "./provider/tslintjson";
-import vscodesettings from "./provider/vscodesettings";
+import * as base from "./provider/base";
+import * as tsconfigjson from "./provider/tsconfigjson";
+import * as editorconfig from "./provider/editorconfig";
+import * as tslintjson from "./provider/tslintjson";
+import * as vscodesettings from "./provider/vscodesettings";
 
 const packageJson = JSON.parse(fs.readFileSync(path.join(__dirname, "../package.json")).toString());
 export const version = packageJson.version;
@@ -144,21 +144,21 @@ export function processString(fileName: string, content: string, opts: Options):
 
     let processor = new Processor();
     if (opts.tsfmt) {
-        processor.addOptionModify(base);
+        processor.addOptionModify(base.makeFormatCodeOptions);
     }
     if (opts.tsconfig) {
-        processor.addOptionModify(tsconfigjson);
+        processor.addOptionModify(tsconfigjson.makeFormatCodeOptions);
     }
     if (opts.editorconfig) {
-        processor.addOptionModify(editorconfig);
-        processor.addPostProcess(editorconfigPostProcess);
+        processor.addOptionModify(editorconfig.makeFormatCodeOptions);
+        processor.addPostProcess(editorconfig.postProcess);
     }
     if (opts.tslint) {
-        processor.addOptionModify(tslintjson);
-        processor.addPostProcess(tslintPostProcess);
+        processor.addOptionModify(tslintjson.makeFormatCodeOptions);
+        processor.addPostProcess(tslintjson.postProcess);
     }
     if (opts.vscode) {
-        processor.addOptionModify(vscodesettings);
+        processor.addOptionModify(vscodesettings.makeFormatCodeOptions);
     }
     processor.addPostProcess((_fileName: string, formattedCode: string, _opts: Options, formatSettings: ts.FormatCodeSettings) => {
         // replace newline code. maybe NewLineCharacter params affect to only "new" newline by language service.
@@ -169,7 +169,7 @@ export function processString(fileName: string, content: string, opts: Options):
     let formatSettings = createDefaultFormatCodeSettings();
     return processor.processFormatCodeOptions(fileName, opts, formatSettings)
         .then(formatSettings => {
-            let formattedCode = formatter(fileName, content, formatSettings);
+            let formattedCode = format(fileName, content, formatSettings);
 
             // apply post process logic
             return processor.postProcess(fileName, formattedCode, opts, formatSettings);
diff --git a/lib/provider/base.ts b/lib/provider/base.ts
index e0bcd34..a8ad016 100644
--- a/lib/provider/base.ts
+++ b/lib/provider/base.ts
@@ -31,7 +31,7 @@ interface TsfmtSettings {
     convertTabsToSpaces?: boolean;
 }
 
-export default function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
+export function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
     let baseDir = opts.baseDir ? path.resolve(opts.baseDir) : path.dirname(path.resolve(fileName));
     let configFileName: string | null;
     if (opts.tsfmtFile && path.isAbsolute(opts.tsfmtFile)) {
diff --git a/lib/provider/editorconfig.ts b/lib/provider/editorconfig.ts
index dc9e322..1112949 100644
--- a/lib/provider/editorconfig.ts
+++ b/lib/provider/editorconfig.ts
@@ -6,7 +6,7 @@ import { Options } from "../";
 
 let emitBaseDirWarning = false;
 
-export default function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): Promise<ts.FormatCodeSettings> {
+export function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): Promise<ts.FormatCodeSettings> {
 
     if (opts.verbose && opts.baseDir && !emitBaseDirWarning) {
         console.log("editorconfig is not supported baseDir options");
diff --git a/lib/provider/tsconfigjson.ts b/lib/provider/tsconfigjson.ts
index 96d6b9a..eb2c77e 100644
--- a/lib/provider/tsconfigjson.ts
+++ b/lib/provider/tsconfigjson.ts
@@ -5,7 +5,7 @@ import * as path from "path";
 import { Options } from "../";
 import { getConfigFileName, readTsconfig } from "../utils";
 
-export default function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
+export function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
 
     let baseDir = opts.baseDir ? path.resolve(opts.baseDir) : path.dirname(path.resolve(fileName));
     let configFileName: string | null;
diff --git a/lib/provider/tslintjson.ts b/lib/provider/tslintjson.ts
index 7a7fd78..185546f 100644
--- a/lib/provider/tslintjson.ts
+++ b/lib/provider/tslintjson.ts
@@ -29,7 +29,7 @@ export interface AdditionalFormatSettings {
     $noConsecutiveBlankLines: boolean;
 }
 
-export default function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
+export function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
 
     let baseDir = opts.baseDir ? path.resolve(opts.baseDir) : path.dirname(path.resolve(fileName));
     let configFileName: string | null;
diff --git a/lib/provider/vscodesettings.ts b/lib/provider/vscodesettings.ts
index 34aa254..92f9b1f 100644
--- a/lib/provider/vscodesettings.ts
+++ b/lib/provider/vscodesettings.ts
@@ -27,7 +27,7 @@ interface VSCodeSettings {
     // insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces, insertSpaceAfterTypeAssertion, insertSpaceBeforeFunctionParenthesis
 }
 
-export default function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
+export function makeFormatCodeOptions(fileName: string, opts: Options, formatSettings: ts.FormatCodeSettings): ts.FormatCodeSettings {
 
     let baseDir = opts.baseDir ? path.resolve(opts.baseDir) : path.dirname(path.resolve(fileName));
     let configFileName = getConfigFileName(baseDir, "./.vscode/settings.json");