diff --git a/Example/testHotUpdate/ios/Podfile.lock b/Example/testHotUpdate/ios/Podfile.lock
index cfff0a6..a89c746 100644
--- a/Example/testHotUpdate/ios/Podfile.lock
+++ b/Example/testHotUpdate/ios/Podfile.lock
@@ -337,7 +337,7 @@ SPEC CHECKSUMS:
   React-jsi: 32285a21b1b24c36060493ed3057a34677d58d09
   React-jsiexecutor: 8909917ff7d8f21a57e443a866fd8d4560e50c65
   React-jsinspector: 111d7d342b07a904c400592e02a2b958f1098b60
-  react-native-update: 5c1c198cf30994de21e05bfff431814f3722948c
+  react-native-update: dd1ae7615b2281c9f2cd842ab672593074999549
   React-RCTActionSheet: 89b037c0fb7d2671607cb645760164e7e0c013f6
   React-RCTAnimation: e3cefa93c38c004c318f7ec04b883eb14b8b8235
   React-RCTBlob: d26ac0e313fbf14e7203473fd593ccaaeee8329e
diff --git a/Example/testHotUpdate/src/index.js b/Example/testHotUpdate/src/index.js
index 2d2a62c..d072044 100644
--- a/Example/testHotUpdate/src/index.js
+++ b/Example/testHotUpdate/src/index.js
@@ -70,10 +70,6 @@ export default class App extends Component {
   };
 
   checkUpdate = async () => {
-    if (__DEV__) {
-      // 开发模式不支持热更新，跳过检查
-      return;
-    }
     let info;
     try {
       info = await checkUpdate(appKey);
diff --git a/android/build.gradle b/android/build.gradle
index d695592..228492e 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,3 +1,5 @@
+int MILLIS_IN_MINUTE = 1000 * 60
+int minutesSinceEpoch = System.currentTimeMillis() / MILLIS_IN_MINUTE
 
 def safeExtGet(prop, fallback) {
     rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
@@ -22,6 +24,17 @@ android {
             jniLibs.srcDirs = ['./lib']
         }
     }
+
+    buildTypes {
+        release {
+            buildConfigField("String", "PUSHY_BUILD_TIME", "\"${minutesSinceEpoch}\"")
+            resValue("string", "pushy_build_time", "${minutesSinceEpoch}")
+        }
+        debug {
+            buildConfigField("String", "PUSHY_BUILD_TIME", "\"0\"")
+            resValue("string", "pushy_build_time", "0")
+        }
+    }
 }
 
 repositories {
diff --git a/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java b/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
index e91a8e2..eec7e0f 100644
--- a/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
+++ b/android/src/main/java/cn/reactnative/modules/update/UpdateContext.java
@@ -59,6 +59,10 @@ public class UpdateContext {
         return null;
     }
 
+    public String getBuildTime() {
+        return BuildConfig.PUSHY_BUILD_TIME;
+    }
+
     public interface DownloadFileListener {
         void onDownloadCompleted();
         void onDownloadFailed(Throwable error);
diff --git a/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java b/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
index 00f5e2e..7af5e79 100644
--- a/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
+++ b/android/src/main/java/cn/reactnative/modules/update/UpdateModule.java
@@ -41,6 +41,7 @@ public class UpdateModule extends ReactContextBaseJavaModule{
         constants.put("downloadRootDir", updateContext.getRootDir());
         constants.put("packageVersion", updateContext.getPackageVersion());
         constants.put("currentVersion", updateContext.getCurrentVersion());
+        constants.put("buildTime", updateContext.getBuildTime());
         boolean isFirstTime = updateContext.isFirstTime();
         constants.put("isFirstTime", isFirstTime);
         if (isFirstTime) {
diff --git a/ios/RCTHotUpdate/RCTHotUpdate.m b/ios/RCTHotUpdate/RCTHotUpdate.m
index dca187f..6cb0728 100644
--- a/ios/RCTHotUpdate/RCTHotUpdate.m
+++ b/ios/RCTHotUpdate/RCTHotUpdate.m
@@ -152,6 +152,7 @@ RCT_EXPORT_MODULE(RCTHotUpdate);
     NSMutableDictionary *ret = [NSMutableDictionary new];
     ret[@"downloadRootDir"] = [RCTHotUpdate downloadDir];
     ret[@"packageVersion"] = [RCTHotUpdate packageVersion];
+    ret[@"buildTime"] = [RCTHotUpdate buildTime];
     ret[@"isRolledBack"] = [defaults objectForKey:keyRolledBackMarked];
     ret[@"isFirstTime"] = [defaults objectForKey:keyFirstLoadMarked];
     NSDictionary *updateInfo = [defaults dictionaryForKey:keyUpdateInfo];
@@ -464,4 +465,15 @@ RCT_EXPORT_METHOD(markSuccess)
     return version;
 }
 
++ (NSString *)buildTime
+{
+#if DEBUG
+    return @"0";
+#else
+    // To be replaced by scripts/generateiOSBuildTime.sh
+    NSString *pushy_build_time = 1570370091
+    return pushy_build_time;
+#endif
+}
+
 @end
diff --git a/lib/index.js b/lib/index.js
index 32faf76..f709ffd 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -8,6 +8,7 @@ export const packageVersion = HotUpdate.packageVersion;
 export const currentVersion = HotUpdate.currentVersion;
 export const isFirstTime = HotUpdate.isFirstTime;
 export const isRolledBack = HotUpdate.isRolledBack;
+export const buildTime = HotUpdate.buildTime;
 
 /*
 Return json:
@@ -49,8 +50,9 @@ export async function checkUpdate(APPKEY) {
       'Content-Type': 'application/json',
     },
     body: JSON.stringify({
-      packageVersion: packageVersion,
+      packageVersion,
       hash: currentVersion,
+      buildTime,
     }),
   });
 
diff --git a/react-native-update.podspec b/react-native-update.podspec
index af82212..fed95a8 100644
--- a/react-native-update.podspec
+++ b/react-native-update.podspec
@@ -17,6 +17,8 @@ Pod::Spec.new do |s|
   s.vendored_libraries = 'RCTHotUpdate/libRCTHotUpdate.a'
   s.pod_target_xcconfig = { 'USER_HEADER_SEARCH_PATHS' => '"$(SRCROOT)/../node_modules/react-native-update/ios"' }
 
+  s.script_phase = { :name => 'Generate build time', :script => '../../node_modules/react-native-update/scripts/generateiOSBuildTime.sh', :execution_position => :before_compile }
+
   s.dependency 'React'
   s.dependency 'SSZipArchive'
 
diff --git a/scripts/generateiOSBuildTime.sh b/scripts/generateiOSBuildTime.sh
new file mode 100755
index 0000000..5145a99
--- /dev/null
+++ b/scripts/generateiOSBuildTime.sh
@@ -0,0 +1,9 @@
+  
+#!/bin/bash
+set -x
+# DEST=$CONFIGURATION_BUILD_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH
+# date +%s > "$DEST/pushy_build_time.txt"
+OLD_TEXT="NSString \*pushy_build_time"
+NEW_TEXT="    NSString \*pushy_build_time = $(date +%s)"
+TARGET_FILE="../../node_modules/react-native-update/ios/RCTHotUpdate/RCTHotUpdate.m"
+sed -i '' -e "s/.*$OLD_TEXT.*/$NEW_TEXT/" "$TARGET_FILE"
\ No newline at end of file