diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0af1a2..79eb376 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](http://semver.org).
 
+## 1.0.1 - 2018-09-19
+
+- fix: add `-optimize` flag to jpegtran by default
+
 ## 1.0.0 - 2018-09-18
 
 - chore: initial public release.
diff --git a/package-lock.json b/package-lock.json
index 2270dae..50d70fe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "imagemin-mozjpeg-full",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -6666,12 +6666,13 @@
       }
     },
     "mozjpeg-binaries": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/mozjpeg-binaries/-/mozjpeg-binaries-1.0.1.tgz",
-      "integrity": "sha512-a6RlKuDbACpFdBDpbIcmHU85nJFlHxtz2Kr6ylclB/2A98fZyjclNkzHeG6yBfVUWHn+4eywiOl7YBeavwxWSw==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/mozjpeg-binaries/-/mozjpeg-binaries-1.1.0.tgz",
+      "integrity": "sha512-3BDVJLEpGCO4ox6UIVR6Nnf7QEzaUuolrM8cyS+wwev7eY6PggZIvBx7tt+ex6iRNIknlzrr2BGIxJgs3VQEug==",
       "requires": {
         "bin-build": "^3.0.0",
-        "bin-wrapper": "^4.0.0"
+        "bin-wrapper": "^4.0.0",
+        "p-queue": "^3.0.0"
       }
     },
     "ms": {
@@ -7261,6 +7262,11 @@
         "p-reduce": "^1.0.0"
       }
     },
+    "p-queue": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/p-queue/-/p-queue-3.0.0.tgz",
+      "integrity": "sha512-2tv/MRmPXfmfnjLLJAHl+DdU8p2DhZafAnlpm/C/T5BpF5L9wKz5tMin4A4N2zVpJL2YMhPlRmtO7s5EtNrjfA=="
+    },
     "p-reduce": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-reduce/-/p-reduce-1.0.0.tgz",
@@ -7495,9 +7501,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "1.14.2",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.14.2.tgz",
-      "integrity": "sha512-McHPg0n1pIke+A/4VcaS2en+pTNjy4xF+Uuq86u/5dyDO59/TtFZtQ708QIRkEZ3qwKz3GVkVa6mpxK/CpB8Rg==",
+      "version": "1.14.3",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.14.3.tgz",
+      "integrity": "sha512-qZDVnCrnpsRJJq5nSsiHCE3BYMED2OtsI+cmzIzF1QIfqm5ALf8tEJcO27zV1gKNKRPdhjO0dNWnrzssDQ1tFg==",
       "dev": true
     },
     "pretty-format": {
diff --git a/package.json b/package.json
index 7c81bb9..503494d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "imagemin-mozjpeg-full",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Imagemin plugin for all mozjpeg binaries (cjpeg and jpegtran).",
   "repository": {
     "type": "git",
@@ -50,7 +50,6 @@
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-react": "^7.1.0",
     "eslint-plugin-unicorn": "^6.0.0",
-    "execa": "^1.0.0",
     "husky": "^0.14.0",
     "jest": "23.6.0",
     "lint-staged": "^7.0.0",
diff --git a/src/jpegtran.js b/src/jpegtran.js
index e66055d..7a29182 100644
--- a/src/jpegtran.js
+++ b/src/jpegtran.js
@@ -27,6 +27,8 @@ module.exports = opts => buf => {
 
   if (options.arithmetic) {
     args.push("-arithmetic");
+  } else {
+    args.push("-optimize");
   }
 
   args.push("-outfile", execBuffer.output, execBuffer.input);