diff --git a/android/build.gradle b/android/build.gradle
index 883f947..ab0ef9b 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,5 +1,12 @@
+File pubspec = new File(project.projectDir.parentFile,  'pubspec.yaml')
+String yaml = pubspec.text
+// Using \s*['|"]?([^\n|'|"]*)['|"]? to extract version number.
+java.util.regex.Matcher versionMatcher = java.util.regex.Pattern.compile("^version:\\s*['|\"]?([^\\n|'|\"]*)['|\"]?\$", java.util.regex.Pattern.MULTILINE).matcher(yaml)
+versionMatcher.find()
+String library_version = versionMatcher.group(1).replaceAll("\\+", "-")
+
 group 'io.github.v7lin.weibo_kit'
-version '4.0.0'
+version library_version
 
 buildscript {
     repositories {
diff --git a/example/ios/Podfile.lock b/example/ios/Podfile.lock
index 4e88ddc..8facbfb 100644
--- a/example/ios/Podfile.lock
+++ b/example/ios/Podfile.lock
@@ -47,4 +47,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 8e679eca47255a8ca8067c4c67aab20e64cb974d
 
-COCOAPODS: 1.11.2
+COCOAPODS: 1.11.3
diff --git a/ios/weibo_kit.podspec b/ios/weibo_kit.podspec
index 0ed1231..b94b58c 100644
--- a/ios/weibo_kit.podspec
+++ b/ios/weibo_kit.podspec
@@ -2,9 +2,13 @@
 # To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
 # Run `pod lib lint weibo_kit.podspec` to validate before publishing.
 #
+
+pubspec = YAML.load_file(File.join('..', 'pubspec.yaml'))
+library_version = pubspec['version'].gsub('+', '-')
+
 Pod::Spec.new do |s|
   s.name             = 'weibo_kit'
-  s.version          = '4.0.0'
+  s.version          = library_version
   s.summary          = 'A powerful Flutter plugin allowing developers to auth/share with natvie Android & iOS Weibo SDKs.'
   s.description      = <<-DESC
 A powerful Flutter plugin allowing developers to auth/share with natvie Android & iOS Weibo SDKs.