diff --git a/build.gradle b/build.gradle
index b44c88f..567cc4e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -33,7 +33,6 @@ test {
 def jvmTargetVersion = "11"
 compileKotlin {
     kotlinOptions.jvmTarget = jvmTargetVersion
-    kotlinOptions.freeCompilerArgs += "-Xopt-in=kotlin.RequiresOptIn"
 }
 compileJava {
     targetCompatibility = jvmTargetVersion
diff --git a/src/main/kotlin/org/mosad/thecitadelofricks/controller/CacheController.kt b/src/main/kotlin/org/mosad/thecitadelofricks/controller/CacheController.kt
index 1683233..3a6db5d 100644
--- a/src/main/kotlin/org/mosad/thecitadelofricks/controller/CacheController.kt
+++ b/src/main/kotlin/org/mosad/thecitadelofricks/controller/CacheController.kt
@@ -255,7 +255,6 @@ class CacheController {
          * update the CourseList every 24h, the Timetables every 3h and the Mensa Menu every hour
          * doesn't account the change between winter and summer time!
          */
-        @OptIn(ExperimentalTime::class)
         private fun scheduledUpdates() {
             val currentTime = System.currentTimeMillis()