diff --git a/build.gradle.kts b/build.gradle.kts
index 236ac3c01c3..cefae42eb8e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  kotlin("jvm") version "1.5.0" apply false
+  kotlin("jvm") version "1.5.10" apply false
   id("org.jetbrains.dokka") version "0.10.0" apply false
   id("com.gradle.plugin-publish") version "0.11.0" apply false
   id("com.github.gmazzo.buildconfig") version "2.0.2" apply false
diff --git a/kotlin-power-assert-plugin/src/main/kotlin/com/bnorm/power/PowerAssertCallTransformer.kt b/kotlin-power-assert-plugin/src/main/kotlin/com/bnorm/power/PowerAssertCallTransformer.kt
index a7ea4f0b9ca..84fbd03e04a 100644
--- a/kotlin-power-assert-plugin/src/main/kotlin/com/bnorm/power/PowerAssertCallTransformer.kt
+++ b/kotlin-power-assert-plugin/src/main/kotlin/com/bnorm/power/PowerAssertCallTransformer.kt
@@ -29,7 +29,7 @@ import com.bnorm.power.diagram.substring
 import com.bnorm.power.internal.ReturnableBlockTransformer
 import org.jetbrains.kotlin.backend.common.IrElementTransformerVoidWithContext
 import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext
-import org.jetbrains.kotlin.backend.common.ir.asSimpleLambda
+import org.jetbrains.kotlin.backend.common.ir.asInlinable
 import org.jetbrains.kotlin.backend.common.ir.inline
 import org.jetbrains.kotlin.backend.common.lower.DeclarationIrBuilder
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageLocation
@@ -37,7 +37,7 @@ import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.backend.js.utils.asString
-import org.jetbrains.kotlin.ir.builders.irCallOp
+import org.jetbrains.kotlin.ir.builders.irBlock
 import org.jetbrains.kotlin.ir.builders.irString
 import org.jetbrains.kotlin.ir.builders.parent
 import org.jetbrains.kotlin.ir.declarations.IrFile
@@ -52,16 +52,14 @@ import org.jetbrains.kotlin.ir.types.IrSimpleType
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.IrTypeArgument
 import org.jetbrains.kotlin.ir.types.IrTypeProjection
-import org.jetbrains.kotlin.ir.types.classOrNull
 import org.jetbrains.kotlin.ir.types.classifierOrNull
 import org.jetbrains.kotlin.ir.types.isBoolean
 import org.jetbrains.kotlin.ir.types.isSubtypeOf
 import org.jetbrains.kotlin.ir.util.deepCopyWithSymbols
-import org.jetbrains.kotlin.ir.util.functions
 import org.jetbrains.kotlin.ir.util.isFunctionOrKFunction
 import org.jetbrains.kotlin.ir.util.kotlinFqName
+import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.util.OperatorNameConventions
 
 class PowerAssertCallTransformer(
   private val file: IrFile,
@@ -159,17 +157,15 @@ class PowerAssertCallTransformer(
     roots: List<Node?>,
     original: IrCall
   ): IrExpression? {
-    val lambda = messageArgument?.asSimpleLambda()
     return when {
       messageArgument is IrConst<*> -> messageArgument
       messageArgument is IrStringConcatenation -> messageArgument
-      lambda != null -> lambda.deepCopyWithSymbols(parent).inline(parent)
-        .transform(ReturnableBlockTransformer(context, scope.scopeOwnerSymbol), null)
-      messageArgument != null -> {
-        val invoke = messageArgument.type.classOrNull!!.owner.functions
-          .single { it.name == OperatorNameConventions.INVOKE }
-        irCallOp(invoke.symbol, invoke.returnType, messageArgument)
-      }
+      messageArgument != null -> irBlock {
+        +messageArgument.deepCopyWithSymbols(parent)
+          .asInlinable(this)
+          .inline(parent)
+          .patchDeclarationParents(scope.getLocalDeclarationParent())
+      }.transform(ReturnableBlockTransformer(context, scope.scopeOwnerSymbol), null)
       // TODO what should the default message be?
       roots.size == 1 && original.getValueArgument(0)!!.type.isBoolean() -> irString("Assertion failed")
       else -> null
diff --git a/sample/build.gradle.kts b/sample/build.gradle.kts
index 77f6c060998..bf2b1b839fa 100644
--- a/sample/build.gradle.kts
+++ b/sample/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  kotlin("multiplatform") version "1.5.0"
+  kotlin("multiplatform") version "1.5.10"
   id("com.bnorm.power.kotlin-power-assert") version "0.8.1"
 }