diff --git a/lib/Config.js b/lib/Config.js
index 4be5d58..b00fec8 100644
--- a/lib/Config.js
+++ b/lib/Config.js
@@ -23,14 +23,6 @@ class Config {
     if (!this.directory) { throw new Error('directory not given'); }
     if (this.filter && typeof this.filter !== 'function') { throw new Error('filter must be a function'); }
 
-    if ('string' === typeof this.tsConfig) {
-      debug('preparsing the ts config into an object for performance');
-      const ts = require('typescript');
-      const tsParsedConfig = ts.readJsonConfigFile(this.tsConfig, ts.sys.readFile);
-      const obj = ts.parseJsonSourceFileConfigFileContent(tsParsedConfig, ts.sys, path.dirname(this.tsConfig));
-      this.tsConfig = obj.raw;
-    }
-
     debug('given filename: ' + this.filename);
 
     this.filename = path.resolve(process.cwd(), this.filename);