diff --git a/dist/index.d.ts b/dist/index.d.ts
index c91f2e9..af749d0 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -6,7 +6,6 @@ export declare class StreamLineReader {
     value: string;
     nextValue: string;
     lineNumber: number;
-    charset: any;
     it?: AsyncIterableIterator<string>;
     eof: number;
     init(readStream: stream.Readable): Promise<StreamLineReader>;
diff --git a/dist/index.js b/dist/index.js
index 0eb8727..88527b0 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -12,7 +12,6 @@ class StreamLineReader {
         this.value = '';
         this.nextValue = '';
         this.lineNumber = -1;
-        this.charset = 'utf8';
         this.eof = -1;
     }
     async init(readStream) {
@@ -68,9 +67,7 @@ class TextFileDiff extends events_1.EventEmitter {
     async diffStream(stream1, stream2) {
         const lineReader1 = await (new StreamLineReader()).init(stream1);
         const lineReader2 = await (new StreamLineReader()).init(stream2);
-        const { compareFn, charset } = this.options;
-        lineReader1.charset = charset;
-        lineReader2.charset = charset;
+        const { compareFn } = this.options;
         if (this.options.skipHeader) {
             await lineReader1.moveNext();
             await lineReader2.moveNext();
@@ -130,4 +127,4 @@ class TextFileDiff extends events_1.EventEmitter {
     }
 }
 exports.default = TextFileDiff;
-//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;AAAA,mCAAoC;AACpC,mCAA2C;AAC3C,2BAA8C;AAC9C,uCAAoD;AAGpD,iCAAkC;AAElC,MAAM,KAAK,GAAG,OAAO,CAAC,gBAAgB,CAAC,CAAC;AAExC,MAAa,gBAAgB;IAA7B;QACE,UAAK,GAAW,EAAE,CAAC;QACnB,cAAS,GAAW,EAAE,CAAC;QACvB,eAAU,GAAW,CAAC,CAAC,CAAC;QACxB,YAAO,GAAQ,MAAM,CAAC;QAEtB,QAAG,GAAW,CAAC,CAAC,CAAC;IA6BnB,CAAC;IA5BC,KAAK,CAAC,IAAI,CAAC,UAA2B;QACpC,MAAM,EAAE,GAAG,0BAAe,CAAC;YACzB,KAAK,EAAE,UAAU;YACjB,SAAS,EAAE,MAAM,CAAC,iBAAiB;SACpC,CAAC,CAAC;QACH,IAAI,CAAC,EAAE,GAAG,EAAE,CAAC,MAAM,CAAC,aAAa,CAAC,EAAE,CAAC;QAErC,qBAAqB;QACrB,MAAM,IAAI,CAAC,QAAQ,EAAE,CAAC;QACtB,MAAM,IAAI,CAAC,QAAQ,EAAE,CAAC;QAEtB,OAAO,IAAI,CAAC;IACd,CAAC;IAED,KAAK,CAAC,QAAQ;QACZ,IAAI,CAAC,KAAK,GAAG,IAAI,CAAC,SAAS,CAAC;QAE5B,MAAM,UAAU,GAAG,MAAM,IAAI,CAAC,EAAE,CAAC,IAAI,EAAE,CAAC;QAExC,IAAI,UAAU,CAAC,IAAI,EAAE;YACnB,IAAI,CAAC,GAAG,EAAE,CAAC;YACX,UAAU,CAAC,KAAK,GAAG,EAAE,CAAC;SACvB;QAED,IAAI,CAAC,SAAS,GAAG,UAAU,CAAC,KAAK,CAAC;QAClC,IAAI,CAAC,UAAU,EAAE,CAAC;QAClB,OAAO,IAAI,CAAC,KAAK,CAAC;IACpB,CAAC;CACF;AAnCD,4CAmCC;AAED;;GAEG;AACH,MAAqB,YAAa,SAAQ,qBAAY;IAGpD,YAAY,OAA4B;QACtC,KAAK,EAAE,CAAC;QACR,IAAI,CAAC,OAAO,GAAG,IAAI,0BAAkB,EAAE,CAAC;QACxC,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC,OAAO,EAAE,OAAO,CAAC,CAAC;IACvC,CAAC;IAED;;;;;OAKG;IACH,KAAK,CAAC,IAAI,CAAC,KAAa,EAAE,KAAa;QACrC,MAAM,OAAO,GAAG,qBAAgB,CAAC,KAAK,CAAC,CAAC;QACxC,MAAM,OAAO,GAAG,qBAAgB,CAAC,KAAK,CAAC,CAAC;QACxC,OAAO,IAAI,CAAC,UAAU,CAAC,OAAO,EAAE,OAAO,CAAC,CAAC;IAC3C,CAAC;IAED;;;;;OAKG;IACH,KAAK,CAAC,UAAU,CAAC,OAAwB,EAAE,OAAwB;QACjE,MAAM,WAAW,GAAG,MAAM,CAAC,IAAI,gBAAgB,EAAE,CAAC,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QACjE,MAAM,WAAW,GAAG,MAAM,CAAC,IAAI,gBAAgB,EAAE,CAAC,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QACjE,MAAM,EAAC,SAAS,EAAE,OAAO,EAAC,GAAG,IAAI,CAAC,OAAO,CAAC;QAE1C,WAAW,CAAC,OAAO,GAAG,OAAO,CAAC;QAC9B,WAAW,CAAC,OAAO,GAAG,OAAO,CAAC;QAE9B,IAAI,IAAI,CAAC,OAAO,CAAC,UAAU,EAAE;YAC3B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;YAC7B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;QAED,qCAAqC;QACrC,+DAA+D;QAC/D,OAAO,WAAW,CAAC,GAAG,GAAG,CAAC,IAAI,WAAW,CAAC,GAAG,GAAG,CAAC,EAAE;YACjD,MAAM,IAAI,CAAC,mBAAmB,CAAC,WAAW,EAAE,WAAW,CAAC,CAAC;SAC1D;QACD,oCAAoC;QAEpC,OAAO,IAAI,CAAC;IACd,CAAC;IAED,KAAK,CAAC,mBAAmB,CAAC,WAA6B,EAAE,WAA6B;QACpF,kDAAkD;QAClD,MAAM,KAAK,GAAG,WAAW,CAAC,KAAK,CAAC;QAChC,MAAM,KAAK,GAAG,WAAW,CAAC,KAAK,CAAC;QAChC,MAAM,GAAG,GAAG,IAAI,CAAC,OAAO,CAAC,SAAS,CAAC,KAAK,EAAE,KAAK,CAAC,CAAC;QAEjD,4BAA4B;QAC5B,iGAAiG;QACjG,mBAAmB;QACnB,IAAI,CAAC,IAAI,CAAC,UAAU,EAAE,KAAK,EAAE,KAAK,EAAE,GAAG,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;QAEnE,uCAAuC;QACvC,IAAI,GAAG,KAAK,CAAC,EAAE;YACb,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;YAC7B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;aAAM,IAAI,GAAG,GAAG,CAAC,EAAE;YAClB,mCAAmC;YACnC,IAAI,GAAG,KAAK,CAAC,EAAE;gBACb,qDAAqD;gBACrD,0BAA0B;gBAC1B,IAAI,WAAW,CAAC,GAAG,GAAG,WAAW,CAAC,GAAG,EAAE;oBACrC,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;qBAAM;oBACL,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;aACF;YAED,0BAA0B;YAC1B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;aAAM,IAAI,GAAG,GAAG,CAAC,EAAE;YAClB,8BAA8B;YAC9B,IAAI,GAAG,KAAK,CAAC,CAAC,EAAE;gBACd,uDAAuD;gBACvD,yBAAyB;gBACzB,IAAI,WAAW,CAAC,GAAG,GAAG,WAAW,CAAC,GAAG,EAAE;oBACrC,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;qBAAM;oBACL,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;aACF;YAED,0BAA0B;YAC1B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;IACH,CAAC;CACF;AA/FD,+BA+FC","sourcesContent":["import {EventEmitter} from 'events';\nimport {TextFileDiffOption} from './types';\nimport {PathLike, createReadStream} from 'fs';\nimport {Interface, createInterface} from 'readline';\nimport stream from 'stream';\n\nimport myDebug = require('debug');\n\nconst debug = myDebug('text-file-diff');\n\nexport class StreamLineReader {\n  value: string = '';\n  nextValue: string = '';\n  lineNumber: number = -1;\n  charset: any = 'utf8';\n  it?: AsyncIterableIterator<string>;\n  eof: number = -1;\n  async init(readStream: stream.Readable): Promise<StreamLineReader> {\n    const rl = createInterface({\n      input: readStream,\n      crlfDelay: Number.POSITIVE_INFINITY\n    });\n    this.it = rl[Symbol.asyncIterator]();\n\n    // move to first line\n    await this.moveNext();\n    await this.moveNext();\n\n    return this;\n  }\n\n  async moveNext(): Promise<string> {\n    this.value = this.nextValue;\n\n    const nextResult = await this.it.next();\n\n    if (nextResult.done) {\n      this.eof++;\n      nextResult.value = '';\n    }\n\n    this.nextValue = nextResult.value;\n    this.lineNumber++;\n    return this.value;\n  }\n}\n\n/**\n * line by line diff of two files\n */\nexport default class TextFileDiff extends EventEmitter {\n  options: TextFileDiffOption;\n\n  constructor(options?: TextFileDiffOption) {\n    super();\n    this.options = new TextFileDiffOption();\n    Object.assign(this.options, options);\n  }\n\n  /**\n   * run diff\n   * @param  String file1 path to file 1\n   * @param  String file2 path to file 2\n   * @return Object         self\n   */\n  async diff(file1: string, file2: string) {\n    const stream1 = createReadStream(file1);\n    const stream2 = createReadStream(file2);\n    return this.diffStream(stream1, stream2);\n  }\n\n  /**\n   * run diffStream\n   * @param  Readable stream1\n   * @param  Readable stream2\n   * @return Object         self\n   */\n  async diffStream(stream1: stream.Readable, stream2: stream.Readable) {\n    const lineReader1 = await (new StreamLineReader()).init(stream1);\n    const lineReader2 = await (new StreamLineReader()).init(stream2);\n    const {compareFn, charset} = this.options;\n\n    lineReader1.charset = charset;\n    lineReader2.charset = charset;\n\n    if (this.options.skipHeader) {\n      await lineReader1.moveNext();\n      await lineReader2.moveNext();\n    }\n\n    /* eslint-disable no-await-in-loop */\n    // while both files has valid val, check for actual false value\n    while (lineReader1.eof < 2 && lineReader2.eof < 2) {\n      await this.doCompareLineReader(lineReader1, lineReader2);\n    }\n    /* eslint-enable no-await-in-loop */\n\n    return this;\n  }\n\n  async doCompareLineReader(lineReader1: StreamLineReader, lineReader2: StreamLineReader) {\n    // forEach line in File1, compare to line in File2\n    const line1 = lineReader1.value;\n    const line2 = lineReader2.value;\n    const cmp = this.options.compareFn(line1, line2);\n\n    // debug(line1, line1, cmp);\n    // debug(lineReader1.nextValue, lineReader2.nextValue, 'next', lineReader1.eof, lineReader2.eof);\n    // emit on compared\n    this.emit('compared', line1, line2, cmp, lineReader1, lineReader2);\n\n    // equals: incr both files to next line\n    if (cmp === 0) {\n      await lineReader1.moveNext();\n      await lineReader2.moveNext();\n    } else if (cmp > 0) {\n      // line1 > line2: new line detected\n      if (cmp === 1) {\n        // if file2 ended before file1, then file2 lost line1\n        // else file2 has new line\n        if (lineReader2.eof > lineReader1.eof) {\n          this.emit('-', line1, lineReader1, lineReader2);\n        } else {\n          this.emit('+', line2, lineReader1, lineReader2);\n        }\n      }\n\n      // incr File2 to next line\n      await lineReader2.moveNext();\n    } else if (cmp < 0) {\n      // line1 < line2: deleted line\n      if (cmp === -1) {\n        // if file1 ended before file2, then file2 has new line\n        // else file1 lost a line\n        if (lineReader1.eof > lineReader2.eof) {\n          this.emit('+', line2, lineReader1, lineReader2);\n        } else {\n          this.emit('-', line1, lineReader1, lineReader2);\n        }\n      }\n\n      // incr File1 to next line\n      await lineReader1.moveNext();\n    }\n  }\n}\n"]}
\ No newline at end of file
+//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;AAAA,mCAAoC;AACpC,mCAA2C;AAC3C,2BAA8C;AAC9C,uCAAoD;AAGpD,iCAAkC;AAElC,MAAM,KAAK,GAAG,OAAO,CAAC,gBAAgB,CAAC,CAAC;AAExC,MAAa,gBAAgB;IAA7B;QACE,UAAK,GAAW,EAAE,CAAC;QACnB,cAAS,GAAW,EAAE,CAAC;QACvB,eAAU,GAAW,CAAC,CAAC,CAAC;QAExB,QAAG,GAAW,CAAC,CAAC,CAAC;IA6BnB,CAAC;IA5BC,KAAK,CAAC,IAAI,CAAC,UAA2B;QACpC,MAAM,EAAE,GAAG,0BAAe,CAAC;YACzB,KAAK,EAAE,UAAU;YACjB,SAAS,EAAE,MAAM,CAAC,iBAAiB;SACpC,CAAC,CAAC;QACH,IAAI,CAAC,EAAE,GAAG,EAAE,CAAC,MAAM,CAAC,aAAa,CAAC,EAAE,CAAC;QAErC,qBAAqB;QACrB,MAAM,IAAI,CAAC,QAAQ,EAAE,CAAC;QACtB,MAAM,IAAI,CAAC,QAAQ,EAAE,CAAC;QAEtB,OAAO,IAAI,CAAC;IACd,CAAC;IAED,KAAK,CAAC,QAAQ;QACZ,IAAI,CAAC,KAAK,GAAG,IAAI,CAAC,SAAS,CAAC;QAE5B,MAAM,UAAU,GAAG,MAAM,IAAI,CAAC,EAAE,CAAC,IAAI,EAAE,CAAC;QAExC,IAAI,UAAU,CAAC,IAAI,EAAE;YACnB,IAAI,CAAC,GAAG,EAAE,CAAC;YACX,UAAU,CAAC,KAAK,GAAG,EAAE,CAAC;SACvB;QAED,IAAI,CAAC,SAAS,GAAG,UAAU,CAAC,KAAK,CAAC;QAClC,IAAI,CAAC,UAAU,EAAE,CAAC;QAClB,OAAO,IAAI,CAAC,KAAK,CAAC;IACpB,CAAC;CACF;AAlCD,4CAkCC;AAED;;GAEG;AACH,MAAqB,YAAa,SAAQ,qBAAY;IAGpD,YAAY,OAA4B;QACtC,KAAK,EAAE,CAAC;QACR,IAAI,CAAC,OAAO,GAAG,IAAI,0BAAkB,EAAE,CAAC;QACxC,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC,OAAO,EAAE,OAAO,CAAC,CAAC;IACvC,CAAC;IAED;;;;;OAKG;IACH,KAAK,CAAC,IAAI,CAAC,KAAa,EAAE,KAAa;QACrC,MAAM,OAAO,GAAG,qBAAgB,CAAC,KAAK,CAAC,CAAC;QACxC,MAAM,OAAO,GAAG,qBAAgB,CAAC,KAAK,CAAC,CAAC;QACxC,OAAO,IAAI,CAAC,UAAU,CAAC,OAAO,EAAE,OAAO,CAAC,CAAC;IAC3C,CAAC;IAED;;;;;OAKG;IACH,KAAK,CAAC,UAAU,CAAC,OAAwB,EAAE,OAAwB;QACjE,MAAM,WAAW,GAAG,MAAM,CAAC,IAAI,gBAAgB,EAAE,CAAC,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QACjE,MAAM,WAAW,GAAG,MAAM,CAAC,IAAI,gBAAgB,EAAE,CAAC,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QACjE,MAAM,EAAC,SAAS,EAAC,GAAG,IAAI,CAAC,OAAO,CAAC;QAEjC,IAAI,IAAI,CAAC,OAAO,CAAC,UAAU,EAAE;YAC3B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;YAC7B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;QAED,qCAAqC;QACrC,+DAA+D;QAC/D,OAAO,WAAW,CAAC,GAAG,GAAG,CAAC,IAAI,WAAW,CAAC,GAAG,GAAG,CAAC,EAAE;YACjD,MAAM,IAAI,CAAC,mBAAmB,CAAC,WAAW,EAAE,WAAW,CAAC,CAAC;SAC1D;QACD,oCAAoC;QAEpC,OAAO,IAAI,CAAC;IACd,CAAC;IAED,KAAK,CAAC,mBAAmB,CAAC,WAA6B,EAAE,WAA6B;QACpF,kDAAkD;QAClD,MAAM,KAAK,GAAG,WAAW,CAAC,KAAK,CAAC;QAChC,MAAM,KAAK,GAAG,WAAW,CAAC,KAAK,CAAC;QAChC,MAAM,GAAG,GAAG,IAAI,CAAC,OAAO,CAAC,SAAS,CAAC,KAAK,EAAE,KAAK,CAAC,CAAC;QAEjD,4BAA4B;QAC5B,iGAAiG;QACjG,mBAAmB;QACnB,IAAI,CAAC,IAAI,CAAC,UAAU,EAAE,KAAK,EAAE,KAAK,EAAE,GAAG,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;QAEnE,uCAAuC;QACvC,IAAI,GAAG,KAAK,CAAC,EAAE;YACb,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;YAC7B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;aAAM,IAAI,GAAG,GAAG,CAAC,EAAE;YAClB,mCAAmC;YACnC,IAAI,GAAG,KAAK,CAAC,EAAE;gBACb,qDAAqD;gBACrD,0BAA0B;gBAC1B,IAAI,WAAW,CAAC,GAAG,GAAG,WAAW,CAAC,GAAG,EAAE;oBACrC,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;qBAAM;oBACL,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;aACF;YAED,0BAA0B;YAC1B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;aAAM,IAAI,GAAG,GAAG,CAAC,EAAE;YAClB,8BAA8B;YAC9B,IAAI,GAAG,KAAK,CAAC,CAAC,EAAE;gBACd,uDAAuD;gBACvD,yBAAyB;gBACzB,IAAI,WAAW,CAAC,GAAG,GAAG,WAAW,CAAC,GAAG,EAAE;oBACrC,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;qBAAM;oBACL,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,KAAK,EAAE,WAAW,EAAE,WAAW,CAAC,CAAC;iBACjD;aACF;YAED,0BAA0B;YAC1B,MAAM,WAAW,CAAC,QAAQ,EAAE,CAAC;SAC9B;IACH,CAAC;CACF;AA5FD,+BA4FC","sourcesContent":["import {EventEmitter} from 'events';\nimport {TextFileDiffOption} from './types';\nimport {PathLike, createReadStream} from 'fs';\nimport {Interface, createInterface} from 'readline';\nimport stream from 'stream';\n\nimport myDebug = require('debug');\n\nconst debug = myDebug('text-file-diff');\n\nexport class StreamLineReader {\n  value: string = '';\n  nextValue: string = '';\n  lineNumber: number = -1;\n  it?: AsyncIterableIterator<string>;\n  eof: number = -1;\n  async init(readStream: stream.Readable): Promise<StreamLineReader> {\n    const rl = createInterface({\n      input: readStream,\n      crlfDelay: Number.POSITIVE_INFINITY\n    });\n    this.it = rl[Symbol.asyncIterator]();\n\n    // move to first line\n    await this.moveNext();\n    await this.moveNext();\n\n    return this;\n  }\n\n  async moveNext(): Promise<string> {\n    this.value = this.nextValue;\n\n    const nextResult = await this.it.next();\n\n    if (nextResult.done) {\n      this.eof++;\n      nextResult.value = '';\n    }\n\n    this.nextValue = nextResult.value;\n    this.lineNumber++;\n    return this.value;\n  }\n}\n\n/**\n * line by line diff of two files\n */\nexport default class TextFileDiff extends EventEmitter {\n  options: TextFileDiffOption;\n\n  constructor(options?: TextFileDiffOption) {\n    super();\n    this.options = new TextFileDiffOption();\n    Object.assign(this.options, options);\n  }\n\n  /**\n   * run diff\n   * @param  String file1 path to file 1\n   * @param  String file2 path to file 2\n   * @return Object         self\n   */\n  async diff(file1: string, file2: string) {\n    const stream1 = createReadStream(file1);\n    const stream2 = createReadStream(file2);\n    return this.diffStream(stream1, stream2);\n  }\n\n  /**\n   * run diffStream\n   * @param  Readable stream1\n   * @param  Readable stream2\n   * @return Object         self\n   */\n  async diffStream(stream1: stream.Readable, stream2: stream.Readable) {\n    const lineReader1 = await (new StreamLineReader()).init(stream1);\n    const lineReader2 = await (new StreamLineReader()).init(stream2);\n    const {compareFn} = this.options;\n\n    if (this.options.skipHeader) {\n      await lineReader1.moveNext();\n      await lineReader2.moveNext();\n    }\n\n    /* eslint-disable no-await-in-loop */\n    // while both files has valid val, check for actual false value\n    while (lineReader1.eof < 2 && lineReader2.eof < 2) {\n      await this.doCompareLineReader(lineReader1, lineReader2);\n    }\n    /* eslint-enable no-await-in-loop */\n\n    return this;\n  }\n\n  async doCompareLineReader(lineReader1: StreamLineReader, lineReader2: StreamLineReader) {\n    // forEach line in File1, compare to line in File2\n    const line1 = lineReader1.value;\n    const line2 = lineReader2.value;\n    const cmp = this.options.compareFn(line1, line2);\n\n    // debug(line1, line1, cmp);\n    // debug(lineReader1.nextValue, lineReader2.nextValue, 'next', lineReader1.eof, lineReader2.eof);\n    // emit on compared\n    this.emit('compared', line1, line2, cmp, lineReader1, lineReader2);\n\n    // equals: incr both files to next line\n    if (cmp === 0) {\n      await lineReader1.moveNext();\n      await lineReader2.moveNext();\n    } else if (cmp > 0) {\n      // line1 > line2: new line detected\n      if (cmp === 1) {\n        // if file2 ended before file1, then file2 lost line1\n        // else file2 has new line\n        if (lineReader2.eof > lineReader1.eof) {\n          this.emit('-', line1, lineReader1, lineReader2);\n        } else {\n          this.emit('+', line2, lineReader1, lineReader2);\n        }\n      }\n\n      // incr File2 to next line\n      await lineReader2.moveNext();\n    } else if (cmp < 0) {\n      // line1 < line2: deleted line\n      if (cmp === -1) {\n        // if file1 ended before file2, then file2 has new line\n        // else file1 lost a line\n        if (lineReader1.eof > lineReader2.eof) {\n          this.emit('+', line2, lineReader1, lineReader2);\n        } else {\n          this.emit('-', line1, lineReader1, lineReader2);\n        }\n      }\n\n      // incr File1 to next line\n      await lineReader1.moveNext();\n    }\n  }\n}\n"]}
\ No newline at end of file
diff --git a/dist/types.d.ts b/dist/types.d.ts
index 149e32f..5a9680f 100644
--- a/dist/types.d.ts
+++ b/dist/types.d.ts
@@ -1,5 +1,4 @@
 export declare class TextFileDiffOption {
     skipHeader: boolean;
-    charset: any;
     compareFn(line1: string, line2: string): 1 | -1 | 0;
 }
diff --git a/dist/types.js b/dist/types.js
index a8d8209..1fc07fa 100644
--- a/dist/types.js
+++ b/dist/types.js
@@ -4,11 +4,10 @@ exports.TextFileDiffOption = void 0;
 class TextFileDiffOption {
     constructor() {
         this.skipHeader = false;
-        this.charset = 'utf8';
     }
     compareFn(line1, line2) {
         return line1 > line2 ? 1 : (line1 < line2 ? -1 : 0);
     }
 }
 exports.TextFileDiffOption = TextFileDiffOption;
-//# sourceMappingURL=data:application/json;base64,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
\ No newline at end of file
+//# sourceMappingURL=data:application/json;base64,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
\ No newline at end of file
diff --git a/package.json b/package.json
index 748b83b..8123828 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "text-file-diff",
-  "version": "1.4.2",
+  "version": "1.4.3",
   "description": "line by line diff of two large files",
   "license": "MIT",
   "repository": "niiknow/text-file-diff",
diff --git a/src/types.ts b/src/types.ts
index 567e71a..b1778cf 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -2,7 +2,6 @@ import {EventEmitter} from 'events';
 
 export class TextFileDiffOption {
   skipHeader: boolean = false;
-  charset: any = 'utf8';
   compareFn(line1: string, line2: string) {
     return line1 > line2 ? 1 : (line1 < line2 ? -1 : 0);
   }