diff --git a/build.gradle b/build.gradle
index 15f4c64..db20f39 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,6 +19,7 @@ allprojects {
     repositories {
         google()
         mavenCentral()
+        jcenter()
     }
 }
 
diff --git a/githubAppUpdate/build.gradle b/githubAppUpdate/build.gradle
index 719c214..50960ff 100644
--- a/githubAppUpdate/build.gradle
+++ b/githubAppUpdate/build.gradle
@@ -9,7 +9,7 @@ android {
 
     defaultConfig {
         targetSdkVersion 33
-        minSdkVersion 21
+        minSdkVersion 26
         project.archivesBaseName = "githubAppUpdate"
     }
 }
@@ -18,6 +18,10 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation 'com.google.code.gson:gson:2.10'
     implementation "androidx.work:work-runtime-ktx:2.7.1"
+    implementation 'org.jfrog.artifactory.client:artifactory-java-client-services:2.13.0'
+//    implementation 'org.apache.httpcomponents:httpclient:4.5.13'
+//    api 'org.apache.httpcomponents:httpcore:4.4.14'
+//    api 'org.apache.httpcomponents:httpmime:4.5.6'
 
     implementation "com.squareup.retrofit2:retrofit:2.9.0"
     implementation "androidx.appcompat:appcompat:1.5.1"
diff --git a/githubAppUpdate/src/main/java/info/hannes/github/AppUpdateHelper.kt b/githubAppUpdate/src/main/java/info/hannes/github/AppUpdateHelper.kt
index 1d44596..d30d3ff 100644
--- a/githubAppUpdate/src/main/java/info/hannes/github/AppUpdateHelper.kt
+++ b/githubAppUpdate/src/main/java/info/hannes/github/AppUpdateHelper.kt
@@ -21,6 +21,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import okhttp3.logging.HttpLoggingInterceptor
+import org.jfrog.artifactory.client.Artifactory
+import org.jfrog.artifactory.client.ArtifactoryClientBuilder
 import retrofit2.Response
 import java.util.concurrent.TimeUnit
 
@@ -48,6 +50,41 @@ object AppUpdateHelper {
         DownloadWorker.run(activity, currentVersionName, gitRepoUrl, repeatTime, timeUnit)
     }
 
+    fun checkArtifactoryDialog(
+        activity: AppCompatActivity,
+        gitRepoUrl: String,
+        callback: ((String) -> Unit)? = null,
+        force: Boolean = false
+    ) = activity.lifecycle.coroutineScope.launch(Dispatchers.Main) {
+
+        val currentVersionName = activity.getVersionName()
+
+        val key = "LAST_VERSION_CHECK"
+        val prefs = PreferenceManager.getDefaultSharedPreferences(activity)
+
+        if (force || prefs.getLong(key, 0) < System.currentTimeMillis() - 1000 * 3600 * 24 / 24 / 60 * 5) {
+            try {
+                val versionList = requestArtifactoryVersions(gitRepoUrl)
+                prefs.edit().putLong(key, System.currentTimeMillis()).apply()
+
+                versionList?.body()?.firstOrNull()?.let { release ->
+                    val assetApk = release.assets.find { it.name.endsWith("release.apk") }
+
+                    Log.d("AppUpdateHelper", release.tagName + " > " + currentVersionName + " " + (release.tagName > currentVersionName))
+                    callback?.invoke(release.tagName)
+                    if (release.tagName > currentVersionName) {
+                        askUser(activity, currentVersionName, release, assetApk)
+                    } else {
+                        callback?.invoke("Nothing to do with ${release.tagName}")
+                    }
+                }
+            } catch (e: Exception) {
+                Log.e("AppUpdateHelper", "git check deliver: ${e.message}")
+                Toast.makeText(activity, "git check delivers: ${e.message}", Toast.LENGTH_LONG).show()
+            }
+        }
+    }
+
     fun checkWithDialog(
         activity: AppCompatActivity,
         gitRepoUrl: String,
@@ -111,6 +148,18 @@ object AppUpdateHelper {
         return client.github.getGithubVersions(gitRepoUrl.user(), gitRepoUrl.repo()).execute()
     }
 
+    private suspend fun requestArtifactoryVersions(artifactoryRepoUrl: String): Response<MutableList<GithubVersion>>? {
+        val artifactory: Artifactory = ArtifactoryClientBuilder.create()
+            .setUrl(artifactoryRepoUrl)
+            //.setUsername("username")
+            //.setPassword("password")
+            .build() // TODO runtime error with "No static field INSTANCE of type Lorg/apache/http/conn/ssl/AllowAllHostnameVerifier"
+        val versionList = withContext(Dispatchers.Default) {
+            artifactory.repositories()
+        }
+        return null
+    }
+
     private suspend fun requestGithubVersions(gitRepoUrl: String): Response<MutableList<GithubVersion>> {
         val versionList = withContext(Dispatchers.Default) {
             val client = GithubClient(HttpLoggingInterceptor.Level.BODY)
diff --git a/sample/build.gradle b/sample/build.gradle
index 611cada..75fe27c 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -10,7 +10,7 @@ android {
         versionCode getGitCommitCount()
         versionName "1.0"
 
-        minSdkVersion 21
+        minSdkVersion 26
         targetSdkVersion 33
 
         buildConfigField "String", 'GIT_REPOSITORY', "\"" + getGitOriginRemote() + "\""
@@ -18,6 +18,7 @@ android {
 
     packagingOptions {
         pickFirst 'META-INF/atomicfu.kotlin_module'
+        pickFirst 'META-INF/DEPENDENCIES'
     }
 
     buildFeatures {
diff --git a/sample/src/main/java/info/hannes/github/sample/MainActivity.kt b/sample/src/main/java/info/hannes/github/sample/MainActivity.kt
index 2b8c883..b64254f 100644
--- a/sample/src/main/java/info/hannes/github/sample/MainActivity.kt
+++ b/sample/src/main/java/info/hannes/github/sample/MainActivity.kt
@@ -27,7 +27,7 @@ class MainActivity : AppCompatActivity() {
             BuildConfig.GIT_REPOSITORY
         )
 
-        binding.button.setOnClickListener {
+        binding.buttonGithub.setOnClickListener {
             AppUpdateHelper.checkWithDialog(
                 this,
                 BuildConfig.GIT_REPOSITORY,
@@ -35,6 +35,15 @@ class MainActivity : AppCompatActivity() {
                 force = true // just to enable debugging, without you can only debug once a day
             )
         }
+
+        binding.buttonArtifactory.setOnClickListener {
+            AppUpdateHelper.checkArtifactoryDialog(
+                this,
+                "https://artifactory.myserver.info",
+                { msg -> Log.d("result", msg) },
+                force = true // just to enable debugging, without you can only debug once a day
+            )
+        }
     }
 
 }
diff --git a/sample/src/main/res/layout/activity_main.xml b/sample/src/main/res/layout/activity_main.xml
index 746ee3a..7c09803 100644
--- a/sample/src/main/res/layout/activity_main.xml
+++ b/sample/src/main/res/layout/activity_main.xml
@@ -6,19 +6,28 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <FrameLayout
+    <LinearLayout
         android:id="@+id/fragment_main"
         android:layout_width="match_parent"
+        android:orientation="horizontal"
         android:layout_height="match_parent">
 
         <Button
-            android:id="@+id/button"
+            android:id="@+id/buttonGithub"
             android:layout_gravity="center|center"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="check"
+            android:text="check Github"
             tools:ignore="HardcodedText" />
-    </FrameLayout>
+
+        <Button
+            android:id="@+id/buttonArtifactory"
+            android:layout_gravity="center|center"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="check Artifactory"
+            tools:ignore="HardcodedText" />
+    </LinearLayout>
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"