diff --git a/sample/build.gradle b/sample/build.gradle
index 0806343..9c5c6f2 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -20,6 +20,6 @@ android {
 dependencies {
   implementation 'com.android.support:appcompat-v7:27.0.2'
   implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-  implementation project(':lib')
+  implementation project(':span')
 }
 
diff --git a/settings.gradle b/settings.gradle
index 035bb58..500f3da 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1 @@
-include ':sample', ':lib'
+include ':sample', ':span'
diff --git a/lib/.gitignore b/span/.gitignore
similarity index 100%
rename from lib/.gitignore
rename to span/.gitignore
diff --git a/lib/build.gradle b/span/build.gradle
similarity index 92%
rename from lib/build.gradle
rename to span/build.gradle
index 3f3cbac..7115fb7 100644
--- a/lib/build.gradle
+++ b/span/build.gradle
@@ -17,8 +17,8 @@ android {
 }
 
 dependencies {
-  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-  implementation 'com.android.support:support-annotations:27.0.2'
+  api "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+  api 'com.android.support:support-annotations:27.0.2'
 }
 
 def GROUP = 'me.gujun.android'
diff --git a/lib/src/main/AndroidManifest.xml b/span/src/main/AndroidManifest.xml
similarity index 100%
rename from lib/src/main/AndroidManifest.xml
rename to span/src/main/AndroidManifest.xml
diff --git a/lib/src/main/kotlin/me/gujun/android/span/span.kt b/span/src/main/kotlin/me/gujun/android/span/span.kt
similarity index 100%
rename from lib/src/main/kotlin/me/gujun/android/span/span.kt
rename to span/src/main/kotlin/me/gujun/android/span/span.kt
diff --git a/lib/src/main/kotlin/me/gujun/android/span/style/CustomTypefaceSpan.kt b/span/src/main/kotlin/me/gujun/android/span/style/CustomTypefaceSpan.kt
similarity index 100%
rename from lib/src/main/kotlin/me/gujun/android/span/style/CustomTypefaceSpan.kt
rename to span/src/main/kotlin/me/gujun/android/span/style/CustomTypefaceSpan.kt
diff --git a/lib/src/main/kotlin/me/gujun/android/span/style/LineSpacingSpan.kt b/span/src/main/kotlin/me/gujun/android/span/style/LineSpacingSpan.kt
similarity index 100%
rename from lib/src/main/kotlin/me/gujun/android/span/style/LineSpacingSpan.kt
rename to span/src/main/kotlin/me/gujun/android/span/style/LineSpacingSpan.kt
diff --git a/lib/src/main/kotlin/me/gujun/android/span/style/TextDecorationLineSpan.kt b/span/src/main/kotlin/me/gujun/android/span/style/TextDecorationLineSpan.kt
similarity index 100%
rename from lib/src/main/kotlin/me/gujun/android/span/style/TextDecorationLineSpan.kt
rename to span/src/main/kotlin/me/gujun/android/span/style/TextDecorationLineSpan.kt