diff --git a/README.md b/README.md
index e59ba10..b157a57 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@
 - 本库依赖使用Gradle构建时添加一下即可
 
 ```javascript
-compile 'com.mylhyl:zxingscanner:2.1.0'
+compile 'com.mylhyl:zxingscanner:2.1.1'
 ```
 
 ## 2、离线jar，需要手动添加 Zxing 核心库
diff --git a/preview/lib/zxingscanner-2.1.0.jar b/preview/lib/zxingscanner-2.1.1.jar
similarity index 88%
rename from preview/lib/zxingscanner-2.1.0.jar
rename to preview/lib/zxingscanner-2.1.1.jar
index e26b553..92a6b11 100644
Binary files a/preview/lib/zxingscanner-2.1.0.jar and b/preview/lib/zxingscanner-2.1.1.jar differ
diff --git a/preview/qrdown.png b/preview/qrdown.png
index 64b79f9..9be6d92 100644
Binary files a/preview/qrdown.png and b/preview/qrdown.png differ
diff --git a/sample/build.gradle b/sample/build.gradle
index 27a2e37..903467b 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "com.mylhyl.zxing.scanner.sample"
         minSdkVersion 15
         targetSdkVersion 23
-        versionCode 3
-        versionName "20171219"
+        versionCode 4
+        versionName "20180412"
     }
     buildTypes {
         release {
diff --git a/zxingscanner/build.gradle b/zxingscanner/build.gradle
index 8d0d409..d6db27e 100644
--- a/zxingscanner/build.gradle
+++ b/zxingscanner/build.gradle
@@ -8,8 +8,8 @@ android {
     defaultConfig {
         minSdkVersion 15
         targetSdkVersion 23
-        versionCode 20171229
-        versionName '2.1.0'
+        versionCode 20180412
+        versionName '2.1.1'
     }
 
     buildTypes {
diff --git a/zxingscanner/src/main/java/com/mylhyl/zxing/scanner/encode/QREncode.java b/zxingscanner/src/main/java/com/mylhyl/zxing/scanner/encode/QREncode.java
index 1425c4f..626889f 100644
--- a/zxingscanner/src/main/java/com/mylhyl/zxing/scanner/encode/QREncode.java
+++ b/zxingscanner/src/main/java/com/mylhyl/zxing/scanner/encode/QREncode.java
@@ -249,7 +249,7 @@ public Builder setLogoBitmap(Bitmap logoBitmap) {
         }
 
         /**
-         * 二维码中间的logo，logoSize不能 > Math.min(logoBitmap.getWidth(), logoBitmap.getHeight())
+         * 二维码中间的logo，logoSize不能大于 Math.min(logoBitmap.getWidth(), logoBitmap.getHeight())
          *
          * @param logoBitmap
          * @param logoSize