diff --git a/benchmarks/build.gradle.kts b/benchmarks/build.gradle.kts
index 24471a9e4..4894cd265 100644
--- a/benchmarks/build.gradle.kts
+++ b/benchmarks/build.gradle.kts
@@ -81,7 +81,7 @@ benchmark {
     // Setup configurations
     targets {
         register("jvm")
-        register("js")
+//        register("js")
     }
 
     fun kotlinx.benchmark.gradle.BenchmarkConfiguration.commonConfiguration() {
diff --git a/gradle.properties b/gradle.properties
index 5d62bf88e..af735ea2d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -12,6 +12,6 @@ org.gradle.jvmargs=-Xmx4096m
 org.gradle.parallel=true
 org.gradle.workers.max=4
 
-toolsVersion=0.15.0-kotlin-1.9.20
+toolsVersion=0.15.0-kotlin-2.0.0-Beta1
 #kotlin.experimental.tryK2=true
 #kscience.wasm.disabled=true
\ No newline at end of file
diff --git a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/base64/base64.kt b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/base64/base64.kt
index 8ea699837..03cd76611 100644
--- a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/base64/base64.kt
+++ b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/base64/base64.kt
@@ -4,11 +4,6 @@
  */
 
 @file:Suppress(
-    "INTERFACE_WITH_SUPERCLASS",
-    "OVERRIDING_FINAL_MEMBER",
-    "RETURN_TYPE_MISMATCH_ON_OVERRIDE",
-    "CONFLICTING_OVERLOADS",
-    "NO_EXPLICIT_VISIBILITY_IN_API_MODE_WARNING",
     "ObjectPropertyName",
     "ClassName",
 )
diff --git a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/binaryen/index.binaryen.kt b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/binaryen/index.binaryen.kt
index 59c9a40a6..8c50de9bb 100644
--- a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/binaryen/index.binaryen.kt
+++ b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/binaryen/index.binaryen.kt
@@ -4,10 +4,6 @@
  */
 
 @file:Suppress(
-    "INTERFACE_WITH_SUPERCLASS",
-    "OVERRIDING_FINAL_MEMBER",
-    "RETURN_TYPE_MISMATCH_ON_OVERRIDE",
-    "CONFLICTING_OVERLOADS",
     "PropertyName",
     "ClassName", "ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING",
 )
diff --git a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/lib.dom.WebAssembly.module_dukat.kt b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/lib.dom.WebAssembly.module_dukat.kt
index 873a5e1d2..628df09b0 100644
--- a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/lib.dom.WebAssembly.module_dukat.kt
+++ b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/lib.dom.WebAssembly.module_dukat.kt
@@ -6,94 +6,46 @@
 @file:JsQualifier("WebAssembly")
 
 @file:Suppress(
-    "INTERFACE_WITH_SUPERCLASS",
-    "OVERRIDING_FINAL_MEMBER",
-    "RETURN_TYPE_MISMATCH_ON_OVERRIDE",
-    "NO_EXPLICIT_VISIBILITY_IN_API_MODE_WARNING",
     "ClassName",
 )
 
 package space.kscience.kmath.internal.webassembly
 
-import space.kscience.kmath.internal.tsstdlib.PromiseLike
 import org.khronos.webgl.ArrayBuffer
 import org.khronos.webgl.ArrayBufferView
 import org.khronos.webgl.Uint8Array
 import org.w3c.fetch.Response
+import space.kscience.kmath.internal.tsstdlib.PromiseLike
 import kotlin.js.Promise
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
-internal external interface CompileError {
-    companion object {
-        var prototype: CompileError
-    }
-}
+internal external interface CompileError 
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
 internal external interface Global {
     var value: Any
     fun valueOf(): Any
-
-    companion object {
-        var prototype: Global
-    }
 }
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
 @JsName("Instance")
 internal external interface Instance1 {
     var exports: Exports
-
-    companion object {
-        var prototype: Instance
-    }
 }
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
-internal external interface LinkError {
-    companion object {
-        var prototype: LinkError
-    }
-}
+internal external interface LinkError
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
 internal external interface Memory {
     var buffer: ArrayBuffer
     fun grow(delta: Number): Number
-
-    companion object {
-        var prototype: Memory
-    }
 }
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
-@JsName("Module")
-internal external interface Module1 {
-    companion object {
-        var prototype: Module
-        fun customSections(moduleObject: Module, sectionName: String): Array<ArrayBuffer>
-        fun exports(moduleObject: Module): Array<ModuleExportDescriptor>
-        fun imports(moduleObject: Module): Array<ModuleImportDescriptor>
-    }
-}
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
-internal external interface RuntimeError {
-    companion object {
-        var prototype: RuntimeError
-    }
-}
+internal external interface RuntimeError
+
 
-@Suppress("NESTED_CLASS_IN_EXTERNAL_INTERFACE")
 internal external interface Table {
     var length: Number
     fun get(index: Number): Function<*>?
     fun grow(delta: Number): Number
     fun set(index: Number, value: Function<*>?)
-
-    companion object {
-        var prototype: Table
-    }
 }
 
 internal external interface GlobalDescriptor {
diff --git a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/nonDeclarations.WebAssembly.kt b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/nonDeclarations.WebAssembly.kt
index ba86e977b..4cef2d85a 100644
--- a/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/nonDeclarations.WebAssembly.kt
+++ b/kmath-ast/src/jsMain/kotlin/space/kscience/kmath/internal/webassembly/nonDeclarations.WebAssembly.kt
@@ -3,13 +3,6 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:Suppress(
-    "INTERFACE_WITH_SUPERCLASS",
-    "OVERRIDING_FINAL_MEMBER",
-    "RETURN_TYPE_MISMATCH_ON_OVERRIDE",
-    "CONFLICTING_OVERLOADS",
-    "NO_EXPLICIT_VISIBILITY_IN_API_MODE_WARNING",
-)
 
 package space.kscience.kmath.internal.webassembly
 
diff --git a/kmath-functions/src/commonTest/kotlin/space/kscience/kmath/functions/testUtils/Rational.kt b/kmath-functions/src/commonTest/kotlin/space/kscience/kmath/functions/testUtils/Rational.kt
index ff05805da..2d21c2224 100644
--- a/kmath-functions/src/commonTest/kotlin/space/kscience/kmath/functions/testUtils/Rational.kt
+++ b/kmath-functions/src/commonTest/kotlin/space/kscience/kmath/functions/testUtils/Rational.kt
@@ -146,7 +146,7 @@ class Rational {
     override fun equals(other: Any?): Boolean =
         when (other) {
             is Rational -> numerator == other.numerator && denominator == other.denominator
-            is Int -> numerator == other && denominator == 1L
+            is Int -> numerator == other.toLong() && denominator == 1L
             is Long -> numerator == other && denominator == 1L
             else -> false
         }
diff --git a/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/euclidean2d/Float64Space2D.kt b/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/euclidean2d/Float64Space2D.kt
index 423e43c30..ba8ea1396 100644
--- a/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/euclidean2d/Float64Space2D.kt
+++ b/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/euclidean2d/Float64Space2D.kt
@@ -37,7 +37,7 @@ public object Float64Space2D : GeometrySpace<DoubleVector2D>, ScaleOperations<Do
         override val y: Double,
     ) : DoubleVector2D
 
-    public object VectorSerializer : KSerializer<DoubleVector2D> {
+    public object VectorSerializer : KSerializer<Float64Vector2D> {
         private val proxySerializer = Vector2DImpl.serializer()
         override val descriptor: SerialDescriptor get() = proxySerializer.descriptor
 
diff --git a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram.kt b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram.kt
index 3303fa172..2a0523e46 100644
--- a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram.kt
+++ b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram.kt
@@ -33,7 +33,7 @@ public interface Histogram<in T : Any, out V, out B : Bin<T, V>> {
     /**
      * Find existing bin, corresponding to given coordinates
      */
-    public operator fun get(point: Point<out T>): B?
+    public operator fun get(point: Point<T>): B?
 
     /**
      * Dimension of the histogram
@@ -57,11 +57,11 @@ public interface HistogramBuilder<in T : Any, V : Any> {
     /**
      * Increment appropriate bin with given value
      */
-    public fun putValue(point: Point<out T>, value: V = defaultValue)
+    public fun putValue(point: Point<T>, value: V = defaultValue)
 
 }
 
-public fun <T : Any> HistogramBuilder<T, *>.put(point: Point<out T>): Unit = putValue(point)
+public fun <T : Any> HistogramBuilder<T, *>.put(point: Point<T>): Unit = putValue(point)
 
 public fun <T : Any> HistogramBuilder<T, *>.put(vararg point: T): Unit = put(point.asBuffer())
 
diff --git a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram1D.kt b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram1D.kt
index f50610a17..7b1496fce 100644
--- a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram1D.kt
+++ b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/Histogram1D.kt
@@ -42,7 +42,7 @@ public interface Histogram1DBuilder<in T : Any, V : Any> : HistogramBuilder<T, V
      */
     public fun putValue(at: T, value: V = defaultValue)
 
-    override fun putValue(point: Point<out T>, value: V) {
+    override fun putValue(point: Point<T>, value: V) {
         require(point.size == 1) { "Only points with single value could be used in Histogram1D" }
         putValue(point[0], value)
     }
diff --git a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/UniformHistogramGroupND.kt b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/UniformHistogramGroupND.kt
index f7094f7a9..2ca3540c2 100644
--- a/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/UniformHistogramGroupND.kt
+++ b/kmath-histograms/src/commonMain/kotlin/space/kscience/kmath/histogram/UniformHistogramGroupND.kt
@@ -91,7 +91,7 @@ public class UniformHistogramGroupND<V : Any, A : Field<V>>(
         val hBuilder = object : HistogramBuilder<Double, V> {
             override val defaultValue: V get() = valueAlgebraND.elementAlgebra.one
 
-            override fun putValue(point: Point<out Double>, value: V) = with(valueAlgebraND.elementAlgebra) {
+            override fun putValue(point: Point<Double>, value: V) = with(valueAlgebraND.elementAlgebra) {
                 val index = getIndexOrNull(point)
                 ndCounter[index].add(value)
             }
diff --git a/kmath-stat/src/jvmTest/kotlin/space/kscience/kmath/stat/MCScopeTest.kt b/kmath-stat/src/jvmTest/kotlin/space/kscience/kmath/stat/MCScopeTest.kt
index dbcf32e27..5eba0fed8 100644
--- a/kmath-stat/src/jvmTest/kotlin/space/kscience/kmath/stat/MCScopeTest.kt
+++ b/kmath-stat/src/jvmTest/kotlin/space/kscience/kmath/stat/MCScopeTest.kt
@@ -68,7 +68,7 @@ internal class MCScopeTest {
     }
 
 
-    @OptIn(DelicateCoroutinesApi::class)
+    @OptIn(DelicateCoroutinesApi::class, ExperimentalCoroutinesApi::class)
     fun compareResult(test: ATest) {
         val res1 = runBlocking(Dispatchers.Default) { test() }
         val res2 = runBlocking(newSingleThreadContext("test")) { test() }