diff --git a/package.json b/package.json
index d077869..0245613 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "setup": "npm install -g semantic-release-cli && semantic-release-cli setup",
     "lint": "tslint  --project tsconfig.json -t codeFrame 'src/**/*.ts' 'test/**/*.ts'",
     "prebuild": "rimraf dist",
-    "build": "tsc --module commonjs && rollup -c rollup.config.ts && typedoc --out docs --target es6 --theme minimal --mode file src",
+    "build": "tsc --module commonjs && rollup -c rollup.config.ts && typedoc --out docs --target es5 --theme minimal --mode file src",
     "start": "rollup -c rollup.config.ts -w",
     "test": "jest --coverage",
     "test:watch": "jest --coverage --watch",
diff --git a/tsconfig.json b/tsconfig.json
index 0c8c0b4..58d7bc4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "moduleResolution": "node",
-    "target": "es6",
+    "target": "es5",
     "module": "es2015",
     "lib": [
       "es2015",