diff --git a/.gitignore b/.gitignore
index 17f8d3f..e509ef0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,29 +1,3 @@
-### Unity ###
-[Ll]ibrary/
-/[Tt]emp/
-[Oo]bj/
-/[Bb]uild/
-[Bb]in/
-
-# Autogenerated VS/MD solution and project files
-*.csproj
-*.unityproj
-*.sln
-*.suo
-*.tmp
-*.user
-*.userprefs
-*.pidb
-*.booproj
-
-# Unity3D generated meta files
-*.pidb.meta
-
-# Unity3D Generated File On Crash Reports
-sysinfo.txt
-
 .DS_Store
-.idea/
-/mkmf.log
-/build/
-/lib/
+*.apk
+*.unitypackage
diff --git a/README.md b/README.md
index 7bb0ff0..b0278e1 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,9 @@
 ## prebuilt library
 
 - prebuilt library are maintained by [prebuilt-libsqlcipher](https://github.com/netpyoung/prebuilt-libsqlcipher)
-  - libsqlcipher v4.5.0
+  - libsqlcipher v4.5.5
+  - libsqlcipher v4.5.4 (android)
+  - libsqlcipher v4.5.0 (windows x86)
 
 ## installation
 
diff --git a/SqlCipher4Unity3D/Assets/SqlCipher4Unity3D/package.json b/SqlCipher4Unity3D/Assets/SqlCipher4Unity3D/package.json
index 06ffb2f..fcfc8ea 100644
--- a/SqlCipher4Unity3D/Assets/SqlCipher4Unity3D/package.json
+++ b/SqlCipher4Unity3D/Assets/SqlCipher4Unity3D/package.json
@@ -1,7 +1,7 @@
 {
     "name": "com.netpyoung.sqlcipher4unity3d",
     "displayName": "SqlCipher4Unity3D",
-    "version": "1.3.0",
+    "version": "1.3.1",
     "unity": "2018.4",
     "description": "SqlCipher made easy for Unity3d.",
     "keywords": [ "database", "sqlite", "sqlcipher", "SqlCipher4Unity3D" ],
diff --git a/SqlCipher4Unity3D/Assets/unitypackage-builder/Editor/PackageTool.cs b/SqlCipher4Unity3D/Assets/unitypackage-builder/Editor/PackageTool.cs
index c43554d..143fd95 100644
--- a/SqlCipher4Unity3D/Assets/unitypackage-builder/Editor/PackageTool.cs
+++ b/SqlCipher4Unity3D/Assets/unitypackage-builder/Editor/PackageTool.cs
@@ -5,7 +5,7 @@ public class PackageTool
     [MenuItem("Package/Update Package")]
     private static void UpdatePackage()
     {
-        const string version = "1.3.0";
+        const string version = "1.3.1";
         AssetDatabase.ExportPackage(new string[] { "Assets/SqlCipher4Unity3D" }, $"../SqlCipher4Unity3D-{version}.unitypackage", ExportPackageOptions.Recurse);
     }
 }