diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 5625344..2f34f5a 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,9 +1,9 @@
 [versions]
-burst = "2.11.0"
+burst = "2.12.2"
 changelog = "2.5.0"
 clikt = "5.1.0"
 intellij-platform = "2.10.5"
-kotlin = "2.3.10"
+kotlin = "2.3.21"
 kotlinx-coroutines = "1.11.0"
 logback = "1.5.32"
 oshai-logging = "8.0.03"
diff --git a/scripting-definition/src/main/kotlin/ServerScriptConfiguration.kt b/scripting-definition/src/main/kotlin/ServerScriptConfiguration.kt
index 398a77b..46d6db1 100644
--- a/scripting-definition/src/main/kotlin/ServerScriptConfiguration.kt
+++ b/scripting-definition/src/main/kotlin/ServerScriptConfiguration.kt
@@ -64,6 +64,7 @@ internal class ServerScriptConfiguration : ScriptCompilationConfiguration(
                 ServerScriptDefinition::class,
                 "kotlin-scripting-dependencies",
                 "scripting-definition",
+                "kotlin-stdlib",
             )
         }
         implicitReceivers(ServerScript::class)
@@ -133,7 +134,7 @@ internal class ServerScriptImportsConfigurator : RefineScriptCompilationConfigur
             ResultWithDiagnostics.Failure(diagnostics)
         } else {
             ScriptCompilationConfiguration(context.compilationConfiguration) {
-                importScripts(scripts)
+                if (scripts.isNotEmpty()) importScripts.append(scripts)
             }.asSuccess()
         }
     }
diff --git a/scripting-host/src/main/kotlin/RequestState.kt b/scripting-host/src/main/kotlin/RequestState.kt
index a962cf2..879a29a 100644
--- a/scripting-host/src/main/kotlin/RequestState.kt
+++ b/scripting-host/src/main/kotlin/RequestState.kt
@@ -47,7 +47,9 @@ import java.nio.file.Path as NioPath
 
 private val logger = KotlinLogging.logger {}
 
-private val scriptingHost = BasicJvmScriptingHost()
+// revert back from legacy usage
+// https://youtrack.jetbrains.com/issue/KT-86352/K2-scripting-FirResolvedTypeRef-exception-when-resolving-extension-functions-from-imported-scripts
+private val scriptingHost = BasicJvmScriptingHost.createLegacy()
 
 class RequestState(
     record: FCGIRecord.BeginRequest,