diff --git a/MainModule/src/main/res/layout/dialog_sign_type.xml b/MainModule/src/main/res/layout/dialog_sign_type.xml
index 138bb500..41f0f871 100644
--- a/MainModule/src/main/res/layout/dialog_sign_type.xml
+++ b/MainModule/src/main/res/layout/dialog_sign_type.xml
@@ -53,9 +53,12 @@
 
         <ImageView
             android:id="@+id/iv_start"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
             android:src="@mipmap/iv_start"
+            android:scaleType="fitXY"
+            app:layout_constraintWidth_percent="0.7"
+            app:layout_constraintDimensionRatio="1:1"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"