diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac4a5574..36105b78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 ### Changed
+- Meta to Json serializer now serializes a single item with index as an array. It is important for plotly integration.
 
 ### Deprecated
 
diff --git a/README.md b/README.md
deleted file mode 100644
index b6a8a566..00000000
--- a/README.md
+++ /dev/null
@@ -1,49 +0,0 @@
-[![JetBrains Research](https://jb.gg/badges/research.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
-[![DOI](https://zenodo.org/badge/148831678.svg)](https://zenodo.org/badge/latestdoi/148831678)
-
-![Gradle build](https://github.com/mipt-npm/dataforge-core/workflows/Gradle%20build/badge.svg)
-
-<hr/>
-
-* ### [dataforge-context](dataforge-context)
-> 
->
-> **Maturity**: DEVELOPMENT
-<hr/>
-
-* ### [dataforge-data](dataforge-data)
-> 
->
-> **Maturity**: EXPERIMENTAL
-<hr/>
-
-* ### [dataforge-io](dataforge-io)
-> 
->
-> **Maturity**: PROTOTYPE
-<hr/>
-
-* ### [dataforge-meta](dataforge-meta)
-> 
->
-> **Maturity**: DEVELOPMENT
-<hr/>
-
-* ### [dataforge-scripting](dataforge-scripting)
-> 
->
-> **Maturity**: PROTOTYPE
-<hr/>
-
-* ### [dataforge-workspace](dataforge-workspace)
-> 
->
-> **Maturity**: EXPERIMENTAL
-<hr/>
-
-* ### [dataforge-io-yaml](dataforge-io/dataforge-io-yaml)
-> YAML meta converters and Front Matter envelope format
->
-> **Maturity**: PROTOTYPE
-<hr/>
-
diff --git a/build.gradle.kts b/build.gradle.kts
index 5b886e58..883306ea 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -9,7 +9,7 @@ plugins {
 
 allprojects {
     group = "space.kscience"
-    version = "0.6.2-dev-kotlin-1.9.0"
+    version = "0.6.2-dev-2"
 }
 
 subprojects {
diff --git a/dataforge-io/build.gradle.kts b/dataforge-io/build.gradle.kts
index 91319d4d..9f2030c7 100644
--- a/dataforge-io/build.gradle.kts
+++ b/dataforge-io/build.gradle.kts
@@ -10,8 +10,8 @@ kscience {
     jvm()
     js()
     native()
-    useSerialization("1.4.1")
-    useSerialization("1.4.1", sourceSet = space.kscience.gradle.DependencySourceSet.TEST) {
+    useSerialization()
+    useSerialization(sourceSet = space.kscience.gradle.DependencySourceSet.TEST) {
         cbor()
     }
     dependencies {
@@ -20,6 +20,6 @@ kscience {
     }
 }
 
-readme{
+readme {
     maturity = space.kscience.gradle.Maturity.PROTOTYPE
 }
\ No newline at end of file
diff --git a/dataforge-io/dataforge-io-yaml/build.gradle.kts b/dataforge-io/dataforge-io-yaml/build.gradle.kts
index b33e1b9a..505ce360 100644
--- a/dataforge-io/dataforge-io-yaml/build.gradle.kts
+++ b/dataforge-io/dataforge-io-yaml/build.gradle.kts
@@ -4,10 +4,6 @@ plugins {
 
 description = "YAML meta IO"
 
-repositories {
-    mavenCentral()
-}
-
 kscience {
     jvm()
     js()
@@ -20,10 +16,6 @@ kscience {
     }
 }
 
-repositories{
-    maven("https://dl.bintray.com/mamoe/yamlkt")
-}
-
 readme{
     maturity = space.kscience.gradle.Maturity.PROTOTYPE
     description ="""
diff --git a/dataforge-meta/build.gradle.kts b/dataforge-meta/build.gradle.kts
index decf0760..51b07113 100644
--- a/dataforge-meta/build.gradle.kts
+++ b/dataforge-meta/build.gradle.kts
@@ -6,7 +6,7 @@ kscience {
     jvm()
     js()
     native()
-    useSerialization("1.4.1"){
+    useSerialization{
         json()
     }
 }
diff --git a/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/JsonMeta.kt b/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/JsonMeta.kt
index e36f0e55..98f0c3e4 100644
--- a/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/JsonMeta.kt
+++ b/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/JsonMeta.kt
@@ -23,7 +23,6 @@ public fun Value.toJson(descriptor: MetaDescriptor? = null): JsonElement = when
 }
 
 //Use these methods to customize JSON key mapping
-@Suppress("NULLABLE_EXTENSION_OPERATOR_WITH_SAFE_CALL_RECEIVER")
 private fun String.toJsonKey(descriptor: MetaDescriptor?) = descriptor?.attributes?.get("jsonName").string ?: toString()
 
 private fun Meta.toJsonWithIndex(descriptor: MetaDescriptor?, index: String?): JsonElement = if (items.isEmpty()) {
@@ -35,9 +34,13 @@ private fun Meta.toJsonWithIndex(descriptor: MetaDescriptor?, index: String?): J
         val childDescriptor = descriptor?.children?.get(body)
         if (list.size == 1) {
             val (token, element) = list.first()
-            //do not add empty element
-            val child: JsonElement = element.toJsonWithIndex(childDescriptor, token.index)
-            body to child
+                //do not add an empty element
+                val child: JsonElement = element.toJsonWithIndex(childDescriptor, token.index)
+            if(token.index == null) {
+                body to child
+            } else {
+                body to JsonArray(listOf(child))
+            }
         } else {
             val elements: List<JsonElement> = list.sortedBy { it.key.index }.mapIndexed { index, entry ->
                 //Use index if it is not equal to the item order
diff --git a/docs/templates/ARTIFACT-TEMPLATE.md b/docs/templates/ARTIFACT-TEMPLATE.md
deleted file mode 100644
index 6b921b05..00000000
--- a/docs/templates/ARTIFACT-TEMPLATE.md
+++ /dev/null
@@ -1,29 +0,0 @@
-> #### Artifact:
->
-> This module artifact: `${group}:${name}:${version}`.
->
->
-> [![Maven Central](https://img.shields.io/maven-central/v/space.kscience/${name}.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22space.kscience%22%20AND%20a:%22${name}%22)
->
-> **Gradle:**
->
-> ```gradle
-> repositories {
->     maven { url 'https://repo.kotlin.link' }
-> }
-> 
-> dependencies {
->     implementation '${group}:${name}:${version}'
-> }
-> ```
-> **Gradle Kotlin DSL:**
->
-> ```kotlin
-> repositories {
->     maven("https://https://repo.kotlin.link")
-> }
-> 
-> dependencies {
->     implementation("${group}:${name}:${version}")
-> }
-> ```
\ No newline at end of file
diff --git a/docs/templates/README-TEMPLATE.md b/docs/templates/README-TEMPLATE.md
index a28f0db3..762e5d7e 100644
--- a/docs/templates/README-TEMPLATE.md
+++ b/docs/templates/README-TEMPLATE.md
@@ -3,4 +3,4 @@
 
 ![Gradle build](https://github.com/mipt-npm/dataforge-core/workflows/Gradle%20build/badge.svg)
 
-$modules
+${modules}
diff --git a/gradle.properties b/gradle.properties
index df992b2c..27743a30 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,4 +6,4 @@ kotlin.mpp.stability.nowarn=true
 kotlin.incremental.js.ir=true
 kotlin.native.ignoreDisabledTargets=true
 
-toolsVersion=0.14.9-kotlin-1.9.0
+toolsVersion=0.14.9-kotlin-1.8.20