diff --git a/.idea/misc.xml b/.idea/misc.xml
index e9349bf..7deb2c1 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,9 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="corretto-17" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="corretto-17" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/README.md b/README.md
index df37682..6b8c945 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Kiloparsec
 
+> 0.7.0-SNAPSHOT is recommended for newer builds; due to extremely poor Kotlin time migration architecture, on Apple targets it is the only working version.
+
+
 __Recommended version is `0.6.8`: to keep the code compatible with current and further versions we
 ask to upgrade to `0.4.2` at least.__ Starting from this version some package names are changed for
 better clarity and fast UDP endpoints are added.
diff --git a/build.gradle.kts b/build.gradle.kts
index 37b2ce8..1b08e34 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,15 +11,15 @@
 import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 
 plugins {
-    kotlin("multiplatform") version "2.1.21"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.21"
-    id("com.android.library") version "8.5.2" apply true
+    kotlin("multiplatform") version "2.2.21"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.2.21"
+    id("com.android.library") version "8.7.2" apply true
     `maven-publish`
     id("org.jetbrains.dokka") version "1.9.20"
 }
 
 group = "net.sergeych"
-version = "0.6.10-SNAPSHOT"
+version = "0.7.0-SNAPSHOT"
 
 repositories {
     mavenCentral()
@@ -30,11 +30,10 @@ repositories {
 }
 
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(21)
     jvm()
     js {
-        browser {
-        }
+        browser()
         nodejs()
     }
     linuxX64()
@@ -61,14 +60,16 @@ kotlin {
             languageSettings.optIn("kotlinx.serialization.ExperimentalSerializationApi")
             languageSettings.optIn("kotlinx.coroutines.ExperimentalCoroutinesApi")
             languageSettings.optIn("kotlin.ExperimentalUnsignedTypes")
+            languageSettings.optIn("kotlin.time.ExperimentalTime")
+
         }
 
         val commonMain by getting {
             dependencies {
-                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.1")
-                implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.8.1")
+                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
+                implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
                 api("io.ktor:ktor-client-core:$ktor_version")
-                api("net.sergeych:crypto2:0.8.4")
+                api("net.sergeych:crypto2:0.9.0")
             }
         }
         val androidMain by getting {
@@ -85,8 +86,8 @@ kotlin {
         val commonTest by getting {
             dependencies {
                 implementation(kotlin("test"))
-                implementation("org.slf4j:slf4j-simple:2.0.9")
-                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.10.1")
+                implementation("org.slf4j:slf4j-simple:2.0.17")
+                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.10.2")
             }
         }
         val ktorSocketTest by creating {
diff --git a/gradle.properties b/gradle.properties
index 470de7c..333acd7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -11,5 +11,10 @@
 kotlin.code.style=official
 kotlin.mpp.applyDefaultHierarchyTemplate=false
 
-kotlin.daemon.jvmargs=-Xmx2048m
-kotlin.native.ignoreDisabledTargets=true
\ No newline at end of file
+kotlin.daemon.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+kotlin.native.ignoreDisabledTargets=true
+
+org.gradle.parallel=true
+org.gradle.configuration-cache=true
+org.gradle.caching=true
+
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index f364ac3..e5bc481 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -10,6 +10,6 @@
 
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
\ No newline at end of file
diff --git a/src/commonMain/kotlin/net/sergeych/kiloparsec/Command.kt b/src/commonMain/kotlin/net/sergeych/kiloparsec/Command.kt
index 5d3a9df..2ee1ef2 100644
--- a/src/commonMain/kotlin/net/sergeych/kiloparsec/Command.kt
+++ b/src/commonMain/kotlin/net/sergeych/kiloparsec/Command.kt
@@ -15,12 +15,11 @@ import kotlinx.serialization.Serializable
 import net.sergeych.bintools.toDataSource
 import net.sergeych.bipack.BipackDecoder
 import net.sergeych.bipack.BipackEncoder
-import net.sergeych.kiloparsec.Command.Call
 import net.sergeych.kiloparsec.Command.Companion.unpackCall
 import net.sergeych.utools.unpack
 
 /**
- * Typesafe command definition. Command is a universal entity in Divan: it is used
+ * Typesafe command definition. Command is a universal entity in kiloparsec (and also diwan): it is used
  * in node-2-node protocols and client API, and most importantly in calling smart contract
  * methods. This is essentially a Kotlin binding to typesafe serialize command calls and
  * deserialize results.
diff --git a/src/commonMain/kotlin/net/sergeych/kiloparsec/Transport.kt b/src/commonMain/kotlin/net/sergeych/kiloparsec/Transport.kt
index 79ad293..646ce40 100644
--- a/src/commonMain/kotlin/net/sergeych/kiloparsec/Transport.kt
+++ b/src/commonMain/kotlin/net/sergeych/kiloparsec/Transport.kt
@@ -27,13 +27,12 @@ import kotlinx.serialization.encoding.Encoder
 import kotlinx.serialization.serializer
 import net.sergeych.bipack.Unsigned
 import net.sergeych.crypto2.toDump
-import net.sergeych.kiloparsec.Transport.Device
 import net.sergeych.mp_logger.*
 import net.sergeych.utools.pack
 import net.sergeych.utools.unpack
 
 /**
- * Divan channel that operates some block [Device] exporting a given [localInterface]
+ * Kiloparsec channel that operates some block [Device] exporting a given [localInterface]
  * to remote callers. [LocalInterface] allows session managing, transmitting exceptions
  * in a scure and multiplatform way and provide local command execution (typed RPC)
  */
@@ -251,7 +250,7 @@ class Transport<S>(
                 } catch (cce: LocalInterface.BreakConnectionException) {
                     info { "closing connection by local request ($cce)" }
                     device.close()
-                } catch (t: RemoteInterface.ClosedException) {
+                } catch (_: RemoteInterface.ClosedException) {
                     // it is ok: we just exit the coroutine normally
                     // and mark we're closing
                     isClosed = true
diff --git a/src/commonTest/kotlin/PackTest.kt b/src/commonTest/kotlin/PackTest.kt
index 176fc57..c936293 100644
--- a/src/commonTest/kotlin/PackTest.kt
+++ b/src/commonTest/kotlin/PackTest.kt
@@ -9,7 +9,6 @@
  */
 
 import kotlinx.coroutines.test.runTest
-import kotlinx.datetime.Instant
 import net.sergeych.bipack.BipackEncoder
 import net.sergeych.crypto2.initCrypto
 import net.sergeych.kiloparsec.KiloParams
@@ -21,6 +20,7 @@ import kotlin.test.Test
 import kotlin.test.assertContentEquals
 import kotlin.test.assertEquals
 import kotlin.time.Duration.Companion.microseconds
+import kotlin.time.Instant
 
 class PackTest {
         inline fun <reified T>check(x: T?) {
diff --git a/src/commonTest/kotlin/TransportTest.kt b/src/commonTest/kotlin/TransportTest.kt
index e4941ff..63b381c 100644
--- a/src/commonTest/kotlin/TransportTest.kt
+++ b/src/commonTest/kotlin/TransportTest.kt
@@ -76,7 +76,8 @@ class TransportTest {
                 "p2: $it"
             }
             on(cmdSlow) {
-                delay(100)
+                // the problem: runTest() breaks delays so it is not enough
+                for( i in 0..10000) delay(1)
                 "done"
             }
         }
diff --git a/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/TcpProvider.kt b/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/TcpProvider.kt
index 01f4480..bed37be 100644
--- a/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/TcpProvider.kt
+++ b/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/TcpProvider.kt
@@ -22,11 +22,11 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
-import kotlinx.datetime.Clock
 import net.sergeych.kiloparsec.*
 import net.sergeych.mp_logger.*
 import net.sergeych.mp_tools.globalLaunch
 import net.sergeych.tools.AtomicCounter
+import kotlin.time.Clock
 import kotlin.time.Duration.Companion.seconds
 
 private val logCounter = AtomicCounter(0)
@@ -140,7 +140,7 @@ private fun inetTransportDevice(
                             sockInput.readFully(data, 0, size)
                             inputBlocks.send(data.toUByteArray())
                         }
-                    } catch (e: ClosedReceiveChannelException) {
+                    } catch (_: ClosedReceiveChannelException) {
                         log.error { "closed receive channel " }
                         stop()
                         break
diff --git a/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/UdpSocketTransport.kt b/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/UdpSocketTransport.kt
index 0b1879d..7750061 100644
--- a/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/UdpSocketTransport.kt
+++ b/src/ktorSocketMain/kotlin/net/sergeych/kiloparsec/adapter/UdpSocketTransport.kt
@@ -19,13 +19,13 @@ import kotlinx.coroutines.channels.ClosedSendChannelException
 import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import kotlinx.datetime.Clock
 import net.sergeych.kiloparsec.SyncValue
 import net.sergeych.mp_logger.Log
 import net.sergeych.mp_logger.Loggable
 import net.sergeych.mp_logger.debug
 import net.sergeych.mp_logger.exception
 import net.sergeych.mp_tools.globalLaunch
+import kotlin.time.Clock
 import kotlin.time.Duration
 
 /**
@@ -171,10 +171,10 @@ internal class UdpSocketTransport(
         while (!isClosed) {
             try {
                 server.sendBlock(UdpBlock.Data(outputDataBlocks.receive()), socketAddress)
-            } catch (e: CancellationException) {
+            } catch (_: CancellationException) {
                 // this is ok
                 break
-            } catch (e: ClosedReceiveChannelException) {
+            } catch (_: ClosedReceiveChannelException) {
                 debug { "input channel is closed, closing" }
                 close()
                 break