diff --git a/build.gradle.kts b/build.gradle.kts
index 7656cd8..a035e3e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -26,6 +26,10 @@ kotlin {
             implementation(libs.node)
         }
     }
+
+    compilerOptions {
+        freeCompilerArgs.add("-opt-in=kotlinx.cinterop.ExperimentalForeignApi")
+    }
 }
 
 publishing.repositories {
diff --git a/src/jsMain/kotlin/com/infendro/shell/Shell.js.kt b/src/jsMain/kotlin/com/infendro/shell/Shell.js.kt
index 290477b..d5b7826 100644
--- a/src/jsMain/kotlin/com/infendro/shell/Shell.js.kt
+++ b/src/jsMain/kotlin/com/infendro/shell/Shell.js.kt
@@ -1,9 +1,9 @@
 package com.infendro.shell
 
-import kotlin.coroutines.resume
-import kotlin.coroutines.suspendCoroutine
 import node.childProcess.ExecOptions
 import node.childProcess.exec
+import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
 
 internal actual suspend fun execute(
     command: Array<String>,
@@ -13,7 +13,7 @@ internal actual suspend fun execute(
     val options = ExecOptions.invoke(cwd = directory)
     exec(command, options) { error, stdout, stderr ->
         val code = if (error == null) 0 else error.code!!.toInt()
-        val value = if (error == null) stdout else stderr
+        val value = (if (error == null) stdout else stderr) as String
         continuation.resume(Shell.Result(code, value))
     }
 }
diff --git a/src/jvmMain/kotlin/com/infendro/shell/Shell.jvm.kt b/src/jvmMain/kotlin/com/infendro/shell/Shell.jvm.kt
index c713ebc..e47b3d6 100644
--- a/src/jvmMain/kotlin/com/infendro/shell/Shell.jvm.kt
+++ b/src/jvmMain/kotlin/com/infendro/shell/Shell.jvm.kt
@@ -6,16 +6,12 @@ internal actual suspend fun execute(
     command: Array<String>,
     directory: String?,
 ): Shell.Result {
-    val process = ProcessBuilder(*command)
-        .also {
-            if (directory != null) {
-                it.directory(File(directory))
-            }
+    val process = ProcessBuilder(*command).also {
+        if (directory != null) {
+            it.directory(File(directory))
         }
-        .start()
+    }.start()
     val code = process.waitFor()
-    val value = process
-        .let { if (code == 0) it.inputReader() else it.errorReader() }
-        .readText()
+    val value = (if (code == 0) process.inputReader() else process.errorReader()).readText()
     return Shell.Result(code, value)
 }
diff --git a/src/nativeMain/kotlin/com/infendro/shell/Shell.native.kt b/src/nativeMain/kotlin/com/infendro/shell/Shell.native.kt
index 315cf82..c3371d3 100644
--- a/src/nativeMain/kotlin/com/infendro/shell/Shell.native.kt
+++ b/src/nativeMain/kotlin/com/infendro/shell/Shell.native.kt
@@ -1,12 +1,10 @@
 package com.infendro.shell
 
 import kotlinx.cinterop.CPointer
-import kotlinx.cinterop.ExperimentalForeignApi
 import kotlinx.cinterop.refTo
 import kotlinx.cinterop.toKString
 import platform.posix.*
 
-@ExperimentalForeignApi
 internal actual suspend fun execute(
     command: Array<String>,
     directory: String?,
@@ -21,7 +19,6 @@ internal actual suspend fun execute(
     return Shell.Result(code, value)
 }
 
-@ExperimentalForeignApi
 private fun CPointer<FILE>.readLines(): List<String> {
     val lines = mutableListOf<String>()
     val buffer = ByteArray(4096)