diff --git a/README.md b/README.md
index 80b0919..f0794ec 100644
--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ allprojects {
 ```
 dependencies {
   ...
-  implementation 'com.github.xuexiangjys:XUpdate:1.1.2'
+  implementation 'com.github.xuexiangjys:XUpdate:1.1.3'
 }
 ```
 
@@ -300,7 +300,7 @@ XUpdate.newBuild(getActivity())
 
 * promptThemeColor: 设置主题颜色（升级/安装按钮的背景色）
 * promptTopResId: 弹窗的标题背景的资源图片
-* promptWidthRatio: 弹窗宽度占屏幕宽度的比例，默认是0.8
+* promptWidthRatio: 弹窗宽度占屏幕宽度的比例，默认是-1，不做约束
 * promptHeightRatio: 弹窗高度占屏幕高度的比例，默认是-1，不做约束
 
 ```
diff --git a/app/build.gradle b/app/build.gradle
index f1fa26b..9c4abc0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -60,7 +60,7 @@ dependencies {
     androidTestImplementation deps.espresso.core
     implementation project(':xupdate-lib')
 
-//    implementation 'com.github.xuexiangjys:XUpdate:1.1.1'
+//    implementation 'com.github.xuexiangjys:XUpdate:1.1.2'
 
     implementation 'com.github.xuexiangjys.XUtil:xutil-core:1.1.6'
     implementation 'com.github.xuexiangjys.XUtil:xutil-sub:1.1.6'
diff --git a/xupdate-lib/src/main/java/com/xuexiang/xupdate/UpdateManager.java b/xupdate-lib/src/main/java/com/xuexiang/xupdate/UpdateManager.java
index 7a823d6..53a9e1d 100644
--- a/xupdate-lib/src/main/java/com/xuexiang/xupdate/UpdateManager.java
+++ b/xupdate-lib/src/main/java/com/xuexiang/xupdate/UpdateManager.java
@@ -653,12 +653,12 @@ public Builder supportBackgroundUpdate(boolean supportBackgroundUpdate) {
         }
 
         /**
-         * 设置版本更新提示器宽度占屏幕的比例，默认是0.8
+         * 设置版本更新提示器宽度占屏幕的比例，默认是-1，不做约束
          *
          * @param widthRatio
          * @return
          */
-        public Builder promptWidthRatio(@FloatRange(from = 0.5F, to = 1F) float widthRatio) {
+        public Builder promptWidthRatio(float widthRatio) {
             promptEntity.setWidthRatio(widthRatio);
             return this;
         }
diff --git a/xupdate-lib/src/main/java/com/xuexiang/xupdate/entity/PromptEntity.java b/xupdate-lib/src/main/java/com/xuexiang/xupdate/entity/PromptEntity.java
index f87cb16..8be15ed 100644
--- a/xupdate-lib/src/main/java/com/xuexiang/xupdate/entity/PromptEntity.java
+++ b/xupdate-lib/src/main/java/com/xuexiang/xupdate/entity/PromptEntity.java
@@ -41,7 +41,7 @@ public PromptEntity() {
         mThemeColor = -1;
         mTopResId = -1;
         mSupportBackgroundUpdate = false;
-        mWidthRatio = 0.8F;
+        mWidthRatio = -1;
         mHeightRatio = -1;
     }
 
@@ -92,7 +92,7 @@ public PromptEntity setSupportBackgroundUpdate(boolean supportBackgroundUpdate)
         return this;
     }
 
-    public PromptEntity setWidthRatio(@FloatRange(from = 0.5F, to = 1F) float widthRatio) {
+    public PromptEntity setWidthRatio(float widthRatio) {
         mWidthRatio = widthRatio;
         return this;
     }
diff --git a/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialog.java b/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialog.java
index 9b97bff..36d9bdd 100644
--- a/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialog.java
+++ b/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialog.java
@@ -250,8 +250,10 @@ private void setDialogTheme(int themeColor, int topResId, float widthRatio, floa
         if (window != null) {
             WindowManager.LayoutParams lp = window.getAttributes();
             DisplayMetrics displayMetrics = getContext().getResources().getDisplayMetrics();
-            lp.width = (int) (displayMetrics.widthPixels * widthRatio);
-            if (heightRatio > 0) {
+            if (widthRatio > 0 && widthRatio < 1) {
+                lp.width = (int) (displayMetrics.widthPixels * widthRatio);
+            }
+            if (heightRatio > 0 && heightRatio < 1) {
                 lp.height = (int) (displayMetrics.heightPixels * heightRatio);
             }
             window.setAttributes(lp);
diff --git a/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialogFragment.java b/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialogFragment.java
index 451e009..a4541ef 100644
--- a/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialogFragment.java
+++ b/xupdate-lib/src/main/java/com/xuexiang/xupdate/widget/UpdateDialogFragment.java
@@ -181,8 +181,10 @@ public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
             window.setGravity(Gravity.CENTER);
             WindowManager.LayoutParams lp = window.getAttributes();
             DisplayMetrics displayMetrics = getContext().getResources().getDisplayMetrics();
-            lp.width = (int) (displayMetrics.widthPixels * mPromptEntity.getWidthRatio());
-            if (mPromptEntity.getHeightRatio() > 0) {
+            if (mPromptEntity.getWidthRatio() > 0 && mPromptEntity.getWidthRatio() < 1) {
+                lp.width = (int) (displayMetrics.widthPixels * mPromptEntity.getWidthRatio());
+            }
+            if (mPromptEntity.getHeightRatio() > 0 && mPromptEntity.getHeightRatio() < 1) {
                 lp.height = (int) (displayMetrics.heightPixels * mPromptEntity.getHeightRatio());
             }
             window.setAttributes(lp);