add opt-in

build.gradle.kts

@@ -26,6 +26,10 @@ kotlin {
             implementation(libs.bytearray)
         }
     }
+
+    compilerOptions {
+        freeCompilerArgs.add("-opt-in=kotlin.time.ExperimentalTime")
+    }
 }
 
 publishing {

src/commonMain/kotlin/com/infendro/otp/TOTP.kt

@@ -4,10 +4,8 @@ import com.infendro.hash.HashFunction
 import com.infendro.hash.SHA1
 import kotlin.time.Duration
 import kotlin.time.Duration.Companion.seconds
-import kotlin.time.ExperimentalTime
 import kotlin.time.Instant
 
-@ExperimentalTime
 class TOTP(
     function: HashFunction = SHA1,
     length: Int = 6,