diff --git a/README.md b/README.md
index 87f42ea..aeaa233 100644
--- a/README.md
+++ b/README.md
@@ -181,8 +181,8 @@ All of the block's fields are optional:
 ```groovy
 snapshotPublisher {
     fabric {
-        distributionEmails = []
-        distributionGroupAliases = []
+        distributionEmails = ""
+        distributionGroupAliases = ""
         distributionNotifications = true
     }
     // ...
@@ -190,7 +190,10 @@ snapshotPublisher {
 ```
 
 - `distributionEmails`: The list of email addresses of those who'll get the release.
+This value is built by joining all emails with commas.
+For example if you want to distribute the build to `email1@mail.com` and `email2@mail.com`, `distributionEmails` value should be `"email1@mail.com,email2@mail.com"`.
 - `distributionGroupAliases`: The list of names (aliases) of the groups defined inside Fabric's Beta that will get the release.
+As well as `distributionEmails`, all aliases must be joined by commas.
 - `distributionNotifications`: If set to `true`, all build's recipients will get an email notification about the release.
 
 > Note: Fabric's Beta limits your release notes to a maximum of 16384 characters.
diff --git a/src/main/kotlin/com/xmartlabs/snapshotpublisher/Constants.kt b/src/main/kotlin/com/xmartlabs/snapshotpublisher/Constants.kt
index 2d9df69..6384929 100644
--- a/src/main/kotlin/com/xmartlabs/snapshotpublisher/Constants.kt
+++ b/src/main/kotlin/com/xmartlabs/snapshotpublisher/Constants.kt
@@ -47,7 +47,7 @@ Last Changes:
 $RELEASE_NOTES_COMMIT_HISTORY_KEY
 """
 
-  val FABRIC_DEPLOY_DISTRIBUTION_EMAILS_DEFAULT_VALUE = listOf<String>()
-  val FABRIC_DEPLOY_DISTRIBUTION_GROUP_ALIASES_DEFAULT_VALUE = listOf<String>()
+  const val FABRIC_DEPLOY_DISTRIBUTION_EMAILS_DEFAULT_VALUE = ""
+  const val FABRIC_DEPLOY_DISTRIBUTION_GROUP_ALIASES_DEFAULT_VALUE = ""
   const val FABRIC_DEPLOY_DISTRIBUTION_NOTIFICATIONS_DEFAULT_VALUE = true
 }
diff --git a/src/main/kotlin/com/xmartlabs/snapshotpublisher/model/FabricReleaseConfig.kt b/src/main/kotlin/com/xmartlabs/snapshotpublisher/model/FabricReleaseConfig.kt
index 785c8db..d3969b7 100644
--- a/src/main/kotlin/com/xmartlabs/snapshotpublisher/model/FabricReleaseConfig.kt
+++ b/src/main/kotlin/com/xmartlabs/snapshotpublisher/model/FabricReleaseConfig.kt
@@ -3,7 +3,7 @@ package com.xmartlabs.snapshotpublisher.model
 import com.xmartlabs.snapshotpublisher.Constants
 
 open class FabricReleaseConfig {
-  var distributionEmails: List<String>? = Constants.FABRIC_DEPLOY_DISTRIBUTION_EMAILS_DEFAULT_VALUE
-  var distributionGroupAliases: List<String>? = Constants.FABRIC_DEPLOY_DISTRIBUTION_GROUP_ALIASES_DEFAULT_VALUE
+  var distributionEmails: String? = Constants.FABRIC_DEPLOY_DISTRIBUTION_EMAILS_DEFAULT_VALUE
+  var distributionGroupAliases: String? = Constants.FABRIC_DEPLOY_DISTRIBUTION_GROUP_ALIASES_DEFAULT_VALUE
   var distributionNotifications: Boolean = Constants.FABRIC_DEPLOY_DISTRIBUTION_NOTIFICATIONS_DEFAULT_VALUE
 }
diff --git a/src/main/kotlin/com/xmartlabs/snapshotpublisher/task/PrepareFabricReleaseTask.kt b/src/main/kotlin/com/xmartlabs/snapshotpublisher/task/PrepareFabricReleaseTask.kt
index afddd33..9b1e67a 100644
--- a/src/main/kotlin/com/xmartlabs/snapshotpublisher/task/PrepareFabricReleaseTask.kt
+++ b/src/main/kotlin/com/xmartlabs/snapshotpublisher/task/PrepareFabricReleaseTask.kt
@@ -28,8 +28,10 @@ open class PrepareFabricReleaseTask : DefaultTask() {
   fun action() {
     val fabric = project.snapshotReleaseExtension.fabric
     with(releaseFabricTask.extensions) {
-      add(BETA_DISTRIBUTION_EMAILS_EXTENSION_NAME, fabric.distributionEmails.toFabricStringList())
-      add(BETA_DISTRIBUTION_GROUP_ALIASES_EXTENSION_NAME, fabric.distributionGroupAliases.toFabricStringList())
+      fabric.distributionEmails
+        ?.let { add(BETA_DISTRIBUTION_EMAILS_EXTENSION_NAME, it) }
+      fabric.distributionGroupAliases
+        ?.let { add(BETA_DISTRIBUTION_GROUP_ALIASES_EXTENSION_NAME, it) }
       add(BETA_DISTRIBUTION_NOTIFICATIONS_EXTENSION_NAME, fabric.distributionNotifications)
       add(BETA_DISTRIBUTION_RELEASE_NOTES_EXTENSION_NAME, getReleaseNotes())
     }
@@ -37,6 +39,4 @@ open class PrepareFabricReleaseTask : DefaultTask() {
 
   private fun getReleaseNotes() =
       ReleaseNotesGenerator.truncateReleaseNotesIfNeeded(generatedReleaseNotesFile.readText(), MAX_RELEASE_NOTES_LENGTH)
-
-  private fun List<String>?.toFabricStringList() = this?.joinToString(",") ?: ""
 }