diff --git a/build.gradle.kts b/build.gradle.kts
index 7432092..ffa0a90 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,6 +6,7 @@ plugins {
 
 group = "com.rootsid.wal"
 version = "1.0.1-SNAPSHOT"
+java.sourceCompatibility = JavaVersion.VERSION_11
 
 repositories {
     mavenCentral()
@@ -47,6 +48,12 @@ dependencies {
     implementation("org.didcommx:peerdid:0.3.0")
 
     implementation("org.junit.jupiter:junit-jupiter:5.8.2")
+
+    // Align versions of all Kotlin components
+    implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
+
+    // Use the Kotlin JDK 8 standard library.
+    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
 }
 
 publishing {
@@ -69,6 +76,10 @@ publishing {
     }
 }
 
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>() {
+    kotlinOptions.jvmTarget = "11"
+}
+
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
     kotlinOptions.freeCompilerArgs += "-opt-in=kotlin.RequiresOptIn"
 }
diff --git a/src/main/kotlin/com/rootsid/wal/library/DLT.kt b/src/main/kotlin/com/rootsid/wal/library/DLT.kt
index a273f65..d3b1be6 100644
--- a/src/main/kotlin/com/rootsid/wal/library/DLT.kt
+++ b/src/main/kotlin/com/rootsid/wal/library/DLT.kt
@@ -231,6 +231,11 @@ fun getDidDocumentJson(wallet: Wallet, didAlias: String): String {
     return getDidDocument(wallet, didAlias).didData.toProto().encodeToJsonString()
 }
 
+@OptIn(PrismSdkInternal::class)
+fun getDidDocumentJson(did: String): String {
+    return getDidDocument(did).didData.toProto().encodeToJsonString()
+}
+
 /**
  * Get did document
  *