diff --git a/gradle.properties b/gradle.properties
index 6686f50bda3da..80a55ffe07a02 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 group=org.jetbrains.kotlin-wrappers
 version=1.0-SNAPSHOT
- version.build=pre.203
+version.build=pre.204
 
 kotlin.code.style=official
 kotlin.js.compiler=both
diff --git a/kotlin-react-dom/src/main/kotlin/react/dom/RDOMBuilder.kt b/kotlin-react-dom/src/main/kotlin/react/dom/RDOMBuilder.kt
index c40278549c06a..5d14b8df58e8f 100644
--- a/kotlin-react-dom/src/main/kotlin/react/dom/RDOMBuilder.kt
+++ b/kotlin-react-dom/src/main/kotlin/react/dom/RDOMBuilder.kt
@@ -18,7 +18,7 @@ external interface DOMProps : WithClassName {
 }
 
 @ReactDsl
-interface RDOMBuilder<out T : Tag>: RBuilder {
+interface RDOMBuilder<out T : Tag> : RBuilder {
     fun setProp(attribute: String, value: Any?) {
         val key = fixAttributeName(attribute)
         domProps.asDynamic()[key] = value
diff --git a/kotlin-react-dom/src/main/kotlin/react/dom/ReactDOMAttributes.kt b/kotlin-react-dom/src/main/kotlin/react/dom/ReactDOMAttributes.kt
index 6870a8cb5887d..2951147bb3fa7 100644
--- a/kotlin-react-dom/src/main/kotlin/react/dom/ReactDOMAttributes.kt
+++ b/kotlin-react-dom/src/main/kotlin/react/dom/ReactDOMAttributes.kt
@@ -201,7 +201,7 @@ private val events = listOf(
     "wrap"
 )
 
-private val attrsMap = events.map { it.lowercase() to it }.toMap().toMutableMap().apply {
+private val attrsMap = events.associateBy { it.lowercase() }.toMutableMap().apply {
     put("class", "className")
     put("ondblclick", "onDoubleClick")
 }
diff --git a/kotlin-react-redux/src/main/kotlin/react/redux/Dsl.kt b/kotlin-react-redux/src/main/kotlin/react/redux/Dsl.kt
index a8667272c29dc..c633f951dd080 100644
--- a/kotlin-react-redux/src/main/kotlin/react/redux/Dsl.kt
+++ b/kotlin-react-redux/src/main/kotlin/react/redux/Dsl.kt
@@ -1,10 +1,7 @@
 package react.redux
 
-import react.child
-import react.RBuilder
-import react.RContext
-import react.RHandler
-import redux.Store
+import react.*
+import redux.*
 
 fun RBuilder.provider(store: Store<*, *, *>, context: RContext<*>? = null, handler: RHandler<ProviderProps>) =
     child<ProviderProps, Provider> {
diff --git a/kotlin-react/src/main/kotlin/react/RBuilder.kt b/kotlin-react/src/main/kotlin/react/RBuilder.kt
index 2e72ddbeb10f1..270d2c40e8582 100644
--- a/kotlin-react/src/main/kotlin/react/RBuilder.kt
+++ b/kotlin-react/src/main/kotlin/react/RBuilder.kt
@@ -180,13 +180,13 @@ inline fun <P : RProps, reified C : Component<P, *>> RBuilder.node(
 ): ReactElement =
     node(C::class, props, children)
 
-open class RBuilderImpl: RBuilder {
+open class RBuilderImpl : RBuilder {
     override val childList = mutableListOf<Any>()
 }
 
 open class RBuilderMultiple : RBuilderImpl()
 
-fun <T: RBuilder> buildElements(builder: T, handler: T.() -> Unit): dynamic {
+fun <T : RBuilder> buildElements(builder: T, handler: T.() -> Unit): dynamic {
     val nodes = builder.apply(handler).childList
     return when (nodes.size) {
         0 -> null
@@ -199,7 +199,7 @@ fun buildElements(handler: RBuilder.() -> Unit): dynamic = buildElements(RBuilde
 
 open class RBuilderSingle : RBuilderImpl()
 
-inline fun <T: RBuilder> buildElement(rBuilder: T, handler: T.() -> Unit): ReactElement =
+inline fun <T : RBuilder> buildElement(rBuilder: T, handler: T.() -> Unit): ReactElement =
     rBuilder.apply(handler)
         .childList.first()
         .unsafeCast<ReactElement>()
diff --git a/kotlin-styled/src/main/kotlin/styled/StyledComponents.kt b/kotlin-styled/src/main/kotlin/styled/StyledComponents.kt
index 9a137705df9e2..ebf87289b2755 100644
--- a/kotlin-styled/src/main/kotlin/styled/StyledComponents.kt
+++ b/kotlin-styled/src/main/kotlin/styled/StyledComponents.kt
@@ -1,13 +1,13 @@
 package styled
 
 import kotlinext.js.*
-import kotlinx.browser.window
+import kotlinx.browser.*
 import kotlinx.css.*
 import kotlinx.html.*
 import org.w3c.dom.*
 import react.*
 import react.dom.*
-import kotlin.js.*
+import kotlin.js.Promise
 
 typealias AnyTagStyledBuilder = StyledDOMBuilder<CommonAttributeGroupFacade>
 typealias AnyBuilder = AnyTagStyledBuilder.() -> Unit
@@ -43,7 +43,7 @@ interface StyledBuilder<P : WithClassName> {
 
 inline fun StyledBuilder<*>.css(handler: RuleSet) = css.handler()
 
-interface StyledElementBuilder<P : WithClassName>: RElementBuilder<P>, StyledBuilder<P> {
+interface StyledElementBuilder<P : WithClassName> : RElementBuilder<P>, StyledBuilder<P> {
     fun create(): ReactElement
 
     companion object {