diff --git a/build-logic/src/main/kotlin/io/github/reactivecircus/kstreamlined/buildlogic/languageSettings.kt b/build-logic/src/main/kotlin/io/github/reactivecircus/kstreamlined/buildlogic/languageSettings.kt
index dcf30688..e1166916 100644
--- a/build-logic/src/main/kotlin/io/github/reactivecircus/kstreamlined/buildlogic/languageSettings.kt
+++ b/build-logic/src/main/kotlin/io/github/reactivecircus/kstreamlined/buildlogic/languageSettings.kt
@@ -5,7 +5,6 @@ import org.jetbrains.kotlin.gradle.plugin.LanguageSettingsBuilder
 internal fun LanguageSettingsBuilder.applyLanguageSettings(): LanguageSettingsBuilder {
     return apply {
         progressiveMode = true
-        optIn("kotlin.RequiresOptIn")
         optIn("kotlin.experimental.ExperimentalObjCName")
         enableLanguageFeature("ContextReceivers")
         enableLanguageFeature("ExplicitBackingFields")