diff --git a/grease/build.gradle.kts b/grease/build.gradle.kts
index 08de9cf..6db6c25 100644
--- a/grease/build.gradle.kts
+++ b/grease/build.gradle.kts
@@ -7,7 +7,7 @@ plugins {
 }
 
 group = "io.deepmedia.tools"
-version = "0.3.4"
+version = "0.3.5"
 
 testing {
     suites {
@@ -97,4 +97,4 @@ deployer {
             token = secret("GHUB_PERSONAL_ACCESS_TOKEN")
         }
     }
-}
\ No newline at end of file
+}
diff --git a/grease/src/main/kotlin/io/deepmedia/tools/grease/GreasePlugin.kt b/grease/src/main/kotlin/io/deepmedia/tools/grease/GreasePlugin.kt
index c8d3f28..e671728 100644
--- a/grease/src/main/kotlin/io/deepmedia/tools/grease/GreasePlugin.kt
+++ b/grease/src/main/kotlin/io/deepmedia/tools/grease/GreasePlugin.kt
@@ -440,7 +440,8 @@ open class GreasePlugin : Plugin<Project> {
 
             fun injectClasses(inputJar: File) {
                 log.d { "Processing inputJar=$inputJar outputDir=${jarExtractWorkdir}..." }
-                val inputFiles = target.zipTree(inputJar).matching { include("**/*.class", "**/*.kotlin_module") }
+                //keep java resources from jar
+                val inputFiles = target.zipTree(inputJar)
                 target.copy {
                     from(inputFiles)
                     into(jarExtractWorkdir)
diff --git a/tests/build.gradle.kts b/tests/build.gradle.kts
new file mode 100644
index 0000000..dbd2cdc
--- /dev/null
+++ b/tests/build.gradle.kts
@@ -0,0 +1,4 @@
+plugins {
+    alias(libs.plugins.android.library) apply false
+    alias(libs.plugins.kotlin.android) apply false
+}
diff --git a/tests/sample-dependency-library/build.gradle.kts b/tests/sample-dependency-library/build.gradle.kts
index e467416..61dc50d 100644
--- a/tests/sample-dependency-library/build.gradle.kts
+++ b/tests/sample-dependency-library/build.gradle.kts
@@ -10,11 +10,16 @@ android {
         minSdk = 21
     }
 
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "17"
     }
 }
 
 dependencies {
     // Empty
-}
\ No newline at end of file
+}
diff --git a/tests/sample-dependency-pure/build.gradle.kts b/tests/sample-dependency-pure/build.gradle.kts
index e221e25..fb59388 100644
--- a/tests/sample-dependency-pure/build.gradle.kts
+++ b/tests/sample-dependency-pure/build.gradle.kts
@@ -10,11 +10,16 @@ android {
         minSdk = 21
     }
 
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "17"
     }
 }
 
 dependencies {
     // Empty
-}
\ No newline at end of file
+}
diff --git a/tests/sample-library/build.gradle.kts b/tests/sample-library/build.gradle.kts
index fd2770c..f56e7b0 100644
--- a/tests/sample-library/build.gradle.kts
+++ b/tests/sample-library/build.gradle.kts
@@ -54,6 +54,15 @@ android {
             path = file("src/main/CMakeLists.txt")
         }
     }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
 }
 
 dependencies {
@@ -71,4 +80,4 @@ dependencies {
     grease("org.tensorflow:tensorflow-lite:2.3.0")
     // Manifest changes, layout resources
     grease("com.otaliastudios:cameraview:2.7.2")
-}
\ No newline at end of file
+}
diff --git a/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/CommandHandler.kt b/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/CommandHandler.kt
new file mode 100644
index 0000000..c5fe393
--- /dev/null
+++ b/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/CommandHandler.kt
@@ -0,0 +1,5 @@
+package io.deepmedia.tools.grease.sample.library.spi
+
+interface CommandHandler {
+    fun handle()
+}
diff --git a/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/SimpleHandler.kt b/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/SimpleHandler.kt
new file mode 100644
index 0000000..05aa897
--- /dev/null
+++ b/tests/sample-library/src/main/java/io/deepmedia/tools/grease/sample/library/spi/SimpleHandler.kt
@@ -0,0 +1,7 @@
+package io.deepmedia.tools.grease.sample.library.spi
+
+class SimpleHandler : CommandHandler {
+    override fun handle() {
+        println("SPI simple handler")
+    }
+}
diff --git a/tests/sample-library/src/main/resources/META-INF/services/io.deepmedia.tools.grease.sample.library.spi.CommandHandler b/tests/sample-library/src/main/resources/META-INF/services/io.deepmedia.tools.grease.sample.library.spi.CommandHandler
new file mode 100644
index 0000000..7e8c49a
--- /dev/null
+++ b/tests/sample-library/src/main/resources/META-INF/services/io.deepmedia.tools.grease.sample.library.spi.CommandHandler
@@ -0,0 +1 @@
+io.deepmedia.tools.grease.sample.library.spi.SimpleHandler