diff --git a/build.gradle.kts b/build.gradle.kts
index b009232f5a2..2ab88016a32 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -123,8 +123,8 @@ extra["versions.junit"] = "4.12"
 extra["versions.javaslang"] = "2.0.6"
 extra["versions.ant"] = "1.8.2"
 extra["versions.android"] = "2.3.1"
-extra["versions.kotlinx-coroutines-core"] = "0.20"
-extra["versions.kotlinx-coroutines-jdk8"] = "0.20"
+extra["versions.kotlinx-coroutines-core"] = "0.26.1-eap13"
+extra["versions.kotlinx-coroutines-jdk8"] = "0.26.1-eap13"
 extra["versions.json"] = "20160807"
 extra["versions.native-platform"] = "0.14"
 extra["versions.ant-launcher"] = "1.8.0"
@@ -274,8 +274,7 @@ allprojects {
     val commonCompilerArgs = listOfNotNull(
         "-Xallow-kotlin-package",
         "-Xread-deserialized-contracts",
-        "-Xprogressive".takeIf { hasProperty("test.progressive.mode") }, // TODO: change to "-progressive" after bootstrap
-        "-XXLanguage:-ReleaseCoroutines"
+        "-Xprogressive".takeIf { hasProperty("test.progressive.mode") } // TODO: change to "-progressive" after bootstrap
     )
 
     tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
diff --git a/compiler/frontend.script/src/org/jetbrains/kotlin/script/AsyncDependencyResolverWrapper.kt b/compiler/frontend.script/src/org/jetbrains/kotlin/script/AsyncDependencyResolverWrapper.kt
index 05b353cbf42..b550872aa09 100644
--- a/compiler/frontend.script/src/org/jetbrains/kotlin/script/AsyncDependencyResolverWrapper.kt
+++ b/compiler/frontend.script/src/org/jetbrains/kotlin/script/AsyncDependencyResolverWrapper.kt
@@ -16,7 +16,7 @@
 
 package org.jetbrains.kotlin.script
 
-import kotlinx.coroutines.experimental.runBlocking
+import kotlinx.coroutines.runBlocking
 import kotlin.script.experimental.dependencies.DependenciesResolver
 import kotlin.script.dependencies.Environment
 import kotlin.script.dependencies.ScriptContents
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/analyzer/AnalyzerFacade.kt b/compiler/frontend/src/org/jetbrains/kotlin/analyzer/AnalyzerFacade.kt
index ceb0ff9d082..d30b748cea5 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/analyzer/AnalyzerFacade.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/analyzer/AnalyzerFacade.kt
@@ -45,7 +45,6 @@ import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.storage.getValue
 import java.util.*
-import kotlin.coroutines.experimental.buildSequence
 
 class ResolverForModule(
     val packageFragmentProvider: PackageFragmentProvider,
@@ -346,7 +345,7 @@ class LazyModuleDependencies<M : ModuleInfo>(
 ) : ModuleDependencies {
     private val dependencies = storageManager.createLazyValue {
         val moduleDescriptor = resolverForProject.descriptorForModule(module)
-        buildSequence {
+        sequence {
             if (firstDependency != null) {
                 yield(resolverForProject.descriptorForModule(firstDependency))
             }
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DoubleColonExpressionResolver.kt b/compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DoubleColonExpressionResolver.kt
index 9a0b07c0465..6e299b9e21c 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DoubleColonExpressionResolver.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DoubleColonExpressionResolver.kt
@@ -53,7 +53,6 @@ import org.jetbrains.kotlin.types.typeUtil.makeNullable
 import org.jetbrains.kotlin.utils.yieldIfNotNull
 import java.util.*
 import javax.inject.Inject
-import kotlin.coroutines.experimental.buildSequence
 
 sealed class DoubleColonLHS(val type: KotlinType) {
     /**
@@ -715,13 +714,13 @@ class DoubleColonExpressionResolver(
                 ?.apply { commitTrace() }?.results
         }
 
-        val resultSequence = buildSequence {
+        val resultSequence = sequence {
             when (lhs) {
                 is DoubleColonLHS.Type -> {
                     val classifier = lhsType.constructor.declarationDescriptor
                     if (classifier !is ClassDescriptor) {
                         c.trace.report(CALLABLE_REFERENCE_LHS_NOT_A_CLASS.on(expression))
-                        return@buildSequence
+                        return@sequence
                     }
 
                     val qualifier = c.trace.get(BindingContext.QUALIFIER, expression.receiverExpression!!)
diff --git a/compiler/tests/org/jetbrains/kotlin/scripts/ScriptProviderTest.kt b/compiler/tests/org/jetbrains/kotlin/scripts/ScriptProviderTest.kt
index 13d8438835a..6e2bd430745 100644
--- a/compiler/tests/org/jetbrains/kotlin/scripts/ScriptProviderTest.kt
+++ b/compiler/tests/org/jetbrains/kotlin/scripts/ScriptProviderTest.kt
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.test.testFramework.KtUsefulTestCase
 import org.junit.Assert
 import org.junit.Test
 import java.util.concurrent.atomic.AtomicInteger
-import kotlin.coroutines.experimental.buildSequence
 import kotlin.script.templates.standard.ScriptTemplateWithArgs
 
 class ScriptProviderTest : KtUsefulTestCase() {
@@ -71,7 +70,7 @@ private class TestScriptDefinitionSource(val counter: AtomicInteger, val defGens
 {
     constructor(counter: AtomicInteger, vararg suffixes: String) : this(counter, suffixes.map { { FakeScriptDefinition(it) } })
 
-    override val definitions: Sequence<KotlinScriptDefinition> = buildSequence {
+    override val definitions: Sequence<KotlinScriptDefinition> = sequence {
         for (gen in defGens) {
             counter.incrementAndGet()
             yield(gen())
diff --git a/core/util.runtime/src/org/jetbrains/kotlin/utils/collections.kt b/core/util.runtime/src/org/jetbrains/kotlin/utils/collections.kt
index f3f3f6bc421..9553bb7f907 100644
--- a/core/util.runtime/src/org/jetbrains/kotlin/utils/collections.kt
+++ b/core/util.runtime/src/org/jetbrains/kotlin/utils/collections.kt
@@ -17,13 +17,12 @@
 package org.jetbrains.kotlin.utils
 
 import java.util.*
-import kotlin.coroutines.experimental.SequenceBuilder
 
 fun <K, V> Iterable<K>.keysToMap(value: (K) -> V): Map<K, V> {
     return associateBy({ it }, value)
 }
 
-fun <K, V: Any> Iterable<K>.keysToMapExceptNulls(value: (K) -> V?): Map<K, V> {
+fun <K, V : Any> Iterable<K>.keysToMapExceptNulls(value: (K) -> V?): Map<K, V> {
     val map = LinkedHashMap<K, V>()
     for (k in this) {
         val v = value(k)
@@ -47,45 +46,44 @@ inline fun <K, V> MutableMap<K, V>.getOrPutNullable(key: K, defaultValue: () ->
         val answer = defaultValue()
         put(key, answer)
         answer
-    }
-    else {
+    } else {
         get(key) as V
     }
 }
 
-inline fun <T, C: Collection<T>> C.ifEmpty(body: () -> C): C = if (isEmpty()) body() else this
+inline fun <T, C : Collection<T>> C.ifEmpty(body: () -> C): C = if (isEmpty()) body() else this
 
-inline fun <K, V, M: Map<K, V>> M.ifEmpty(body: () -> M): M = if (isEmpty()) body() else this
+inline fun <K, V, M : Map<K, V>> M.ifEmpty(body: () -> M): M = if (isEmpty()) body() else this
 
 inline fun <T> Array<out T>.ifEmpty(body: () -> Array<out T>): Array<out T> = if (isEmpty()) body() else this
 
-fun <T: Any> MutableCollection<T>.addIfNotNull(t: T?) {
+fun <T : Any> MutableCollection<T>.addIfNotNull(t: T?) {
     if (t != null) add(t)
 }
 
-suspend fun <T: Any> SequenceBuilder<T>.yieldIfNotNull(t: T?) = if (t != null) yield(t) else Unit
+suspend fun <T : Any> SequenceScope<T>.yieldIfNotNull(t: T?) = if (t != null) yield(t) else Unit
 
 fun <K, V> newHashMapWithExpectedSize(expectedSize: Int): HashMap<K, V> =
-        HashMap(capacity(expectedSize))
+    HashMap(capacity(expectedSize))
 
 fun <E> newHashSetWithExpectedSize(expectedSize: Int): HashSet<E> =
-        HashSet(capacity(expectedSize))
+    HashSet(capacity(expectedSize))
 
 fun <K, V> newLinkedHashMapWithExpectedSize(expectedSize: Int): LinkedHashMap<K, V> =
-        LinkedHashMap(capacity(expectedSize))
+    LinkedHashMap(capacity(expectedSize))
 
 fun <E> newLinkedHashSetWithExpectedSize(expectedSize: Int): LinkedHashSet<E> =
-        LinkedHashSet(capacity(expectedSize))
+    LinkedHashSet(capacity(expectedSize))
 
 private fun capacity(expectedSize: Int): Int =
-        if (expectedSize < 3) 3 else expectedSize + expectedSize / 3 + 1
+    if (expectedSize < 3) 3 else expectedSize + expectedSize / 3 + 1
 
 fun <T> ArrayList<T>.compact(): List<T> =
-        when (size) {
-            0 -> emptyList()
-            1 -> listOf(first())
-            else -> apply { trimToSize() }
-        }
+    when (size) {
+        0 -> emptyList()
+        1 -> listOf(first())
+        else -> apply { trimToSize() }
+    }
 
 fun <T> List<T>.indexOfFirst(startFrom: Int, predicate: (T) -> Boolean): Int {
     for (index in startFrom..lastIndex) {
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/getModuleInfo.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/getModuleInfo.kt
index 29fd3ce8836..d92ca67d6ea 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/getModuleInfo.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/getModuleInfo.kt
@@ -30,7 +30,6 @@ import org.jetbrains.kotlin.script.findScriptDefinition
 import org.jetbrains.kotlin.utils.addIfNotNull
 import org.jetbrains.kotlin.utils.sure
 import org.jetbrains.kotlin.utils.yieldIfNotNull
-import kotlin.coroutines.experimental.buildSequence
 
 var PsiFile.forcedModuleInfo: ModuleInfo? by UserDataProperty(Key.create("FORCED_MODULE_INFO"))
 
@@ -121,7 +120,7 @@ private sealed class ModuleInfoCollector<out T>(
             emptySequence()
         },
         virtualFileProcessor = { project, virtualFile, isLibrarySource ->
-            buildSequence {
+            sequence {
                 collectInfosByVirtualFile(
                     project,
                     virtualFile,
diff --git a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBenchmarkSink.kt b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBenchmarkSink.kt
index 599a8ed0932..9d30b24b058 100644
--- a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBenchmarkSink.kt
+++ b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionBenchmarkSink.kt
@@ -16,7 +16,7 @@
 
 package org.jetbrains.kotlin.idea.completion
 
-import kotlinx.coroutines.experimental.channels.ConflatedChannel
+import kotlinx.coroutines.channels.ConflatedChannel
 import java.lang.System.currentTimeMillis
 
 
diff --git a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDependenciesCache.kt b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDependenciesCache.kt
index 0bc1c2c41e9..c5dbd489d12 100644
--- a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDependenciesCache.kt
+++ b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDependenciesCache.kt
@@ -24,7 +24,7 @@ import com.intellij.psi.PsiElementFinder
 import com.intellij.psi.PsiManager
 import com.intellij.psi.search.NonClasspathDirectoriesScope
 import com.intellij.util.containers.SLRUMap
-import kotlinx.coroutines.experimental.launch
+import kotlinx.coroutines.launch
 import org.jetbrains.kotlin.idea.core.util.EDT
 import org.jetbrains.kotlin.utils.addIfNotNull
 import java.io.File
diff --git a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/dependencies/AsyncScriptDependenciesLoader.kt b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/dependencies/AsyncScriptDependenciesLoader.kt
index 9635e9dff35..6b110db9c22 100644
--- a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/dependencies/AsyncScriptDependenciesLoader.kt
+++ b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/dependencies/AsyncScriptDependenciesLoader.kt
@@ -7,7 +7,7 @@ package org.jetbrains.kotlin.idea.core.script.dependencies
 
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
-import kotlinx.coroutines.experimental.*
+import kotlinx.coroutines.*
 import org.jetbrains.kotlin.idea.core.script.settings.KotlinScriptingSettings
 import org.jetbrains.kotlin.idea.core.util.cancelOnDisposal
 import org.jetbrains.kotlin.script.KotlinScriptDefinition
diff --git a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/util/CoroutineUtils.kt b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/util/CoroutineUtils.kt
index 176ca6e0006..bccbcb1f2cf 100644
--- a/idea/idea-core/src/org/jetbrains/kotlin/idea/core/util/CoroutineUtils.kt
+++ b/idea/idea-core/src/org/jetbrains/kotlin/idea/core/util/CoroutineUtils.kt
@@ -22,10 +22,10 @@ import com.intellij.openapi.application.ModalityState
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Disposer
-import kotlinx.coroutines.experimental.CoroutineDispatcher
-import kotlinx.coroutines.experimental.Job
-import kotlin.coroutines.experimental.AbstractCoroutineContextElement
-import kotlin.coroutines.experimental.CoroutineContext
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Job
+import kotlin.coroutines.AbstractCoroutineContextElement
+import kotlin.coroutines.CoroutineContext
 
 
 public object EDT : CoroutineDispatcher() {
diff --git a/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/AbstractCompletionBenchmarkAction.kt b/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/AbstractCompletionBenchmarkAction.kt
index 2442d270f8a..22a1118b364 100644
--- a/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/AbstractCompletionBenchmarkAction.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/AbstractCompletionBenchmarkAction.kt
@@ -36,10 +36,10 @@ import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.ui.components.JBLabel
 import com.intellij.ui.components.JBTextField
 import com.intellij.uiDesigner.core.GridConstraints
-import kotlinx.coroutines.experimental.CancellationException
-import kotlinx.coroutines.experimental.delay
-import kotlinx.coroutines.experimental.launch
-import kotlinx.coroutines.experimental.withTimeout
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withTimeout
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.caches.project.ModuleOrigin
 import org.jetbrains.kotlin.idea.caches.project.getNullableModuleInfo
diff --git a/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/HighlightingBenchmarkAction.kt b/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/HighlightingBenchmarkAction.kt
index 6c0a9fc87a5..437a46c265e 100644
--- a/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/HighlightingBenchmarkAction.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/actions/internal/benchmark/HighlightingBenchmarkAction.kt
@@ -32,9 +32,9 @@ import com.intellij.psi.PsiDocumentManager
 import com.intellij.ui.components.JBPanel
 import com.intellij.ui.components.JBTextField
 import com.intellij.uiDesigner.core.GridLayoutManager
-import kotlinx.coroutines.experimental.channels.ConflatedChannel
-import kotlinx.coroutines.experimental.delay
-import kotlinx.coroutines.experimental.launch
+import kotlinx.coroutines.channels.ConflatedChannel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 import org.jetbrains.kotlin.idea.actions.internal.benchmark.AbstractCompletionBenchmarkAction.Companion.addBoxWithLabel
 import org.jetbrains.kotlin.idea.actions.internal.benchmark.AbstractCompletionBenchmarkAction.Companion.collectSuitableKotlinFiles
 import org.jetbrains.kotlin.idea.actions.internal.benchmark.AbstractCompletionBenchmarkAction.Companion.shuffledSequence
diff --git a/idea/src/org/jetbrains/kotlin/idea/editor/KotlinLiteralCopyPasteProcessor.kt b/idea/src/org/jetbrains/kotlin/idea/editor/KotlinLiteralCopyPasteProcessor.kt
index a017ba33bdb..21fe8c8507b 100644
--- a/idea/src/org/jetbrains/kotlin/idea/editor/KotlinLiteralCopyPasteProcessor.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/editor/KotlinLiteralCopyPasteProcessor.kt
@@ -34,8 +34,6 @@ import org.jetbrains.kotlin.psi.KtEscapeStringTemplateEntry
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.KtStringTemplateExpression
 import org.jetbrains.kotlin.psi.psiUtil.*
-import kotlin.coroutines.experimental.SequenceBuilder
-import kotlin.coroutines.experimental.buildIterator
 
 private val PsiElement.templateContentRange: TextRange?
     get() = this.getParentOfType<KtStringTemplateExpression>(false)?.let{
@@ -219,7 +217,7 @@ private class TemplateTokenSequence(private val inputString: String) : Sequence<
         }
     }
 
-    private suspend fun SequenceBuilder<TemplateChunk>.yieldLiteral(chunk: String) {
+    private suspend fun SequenceScope<TemplateChunk>.yieldLiteral(chunk: String) {
         val splitLines = LineTokenizer.tokenize(chunk, false, false)
         for (i in 0..splitLines.size - 1) {
             if (i != 0) {
@@ -233,7 +231,7 @@ private class TemplateTokenSequence(private val inputString: String) : Sequence<
         if (inputString.isEmpty()) {
             return emptySequence<TemplateChunk>().iterator()
         }
-        return buildIterator {
+        return iterator {
             var from = 0
             var to = 0
             while (to < inputString.length) {
diff --git a/idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessor.kt b/idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessor.kt
index 279e1b04311..17f7dbf69ce 100644
--- a/idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessor.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessor.kt
@@ -23,8 +23,8 @@ import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiRecursiveElementVisitor
 import com.intellij.psi.codeStyle.CodeStyleManager
-import kotlinx.coroutines.experimental.run
-import kotlinx.coroutines.experimental.runBlocking
+import kotlinx.coroutines.run
+import kotlinx.coroutines.runBlocking
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
 import org.jetbrains.kotlin.idea.caches.resolve.resolveImportReference
 import org.jetbrains.kotlin.idea.conversion.copy.range
diff --git a/libraries/scripting/common/src/kotlin/script/experimental/host/BasicScriptingHost.kt b/libraries/scripting/common/src/kotlin/script/experimental/host/BasicScriptingHost.kt
index ed0c9880824..cef092a5337 100644
--- a/libraries/scripting/common/src/kotlin/script/experimental/host/BasicScriptingHost.kt
+++ b/libraries/scripting/common/src/kotlin/script/experimental/host/BasicScriptingHost.kt
@@ -18,8 +18,8 @@
 
 package kotlin.script.experimental.host
 
-import kotlinx.coroutines.experimental.CoroutineScope
-import kotlinx.coroutines.experimental.runBlocking
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.runBlocking
 import kotlin.script.experimental.api.*
 
 /**
diff --git a/libraries/scripting/jvm/src/kotlin/script/experimental/jvm/impl/BridgeDependenciesResolver.kt b/libraries/scripting/jvm/src/kotlin/script/experimental/jvm/impl/BridgeDependenciesResolver.kt
index 77cacb34e5e..2a90aa18daa 100644
--- a/libraries/scripting/jvm/src/kotlin/script/experimental/jvm/impl/BridgeDependenciesResolver.kt
+++ b/libraries/scripting/jvm/src/kotlin/script/experimental/jvm/impl/BridgeDependenciesResolver.kt
@@ -5,7 +5,7 @@
 
 package kotlin.script.experimental.jvm.impl
 
-import kotlinx.coroutines.experimental.runBlocking
+import kotlinx.coroutines.runBlocking
 import java.io.File
 import kotlin.script.dependencies.Environment
 import kotlin.script.dependencies.ScriptContents