diff --git a/build.gradle.kts b/build.gradle.kts
index a831f3c..2a6e2be 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,7 +8,7 @@ buildscript {
 }
 
 plugins {
-    kotlin("jvm") version "1.5.0-M2"
+    kotlin("jvm") version "1.5.0-RC"
     id("com.github.johnrengelman.shadow") version "6.1.0" apply false
     id("architectury-plugin") version "3.0-SNAPSHOT"
     id("forgified-fabric-loom") version "0.7.0-SNAPSHOT" apply false
@@ -89,7 +89,7 @@ allprojects {
         }
         withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class) {
             with(kotlinOptions) {
-                freeCompilerArgs = listOf("-Xjvm-default=all")
+                freeCompilerArgs = listOf("-Xjvm-default=all -Xlambdas=indy")
                 useIR = true
                 jvmTarget = "1.8"
                 languageVersion = "1.5"
@@ -124,4 +124,4 @@ allprojects {
             }
         }
     }
-}
+}
\ No newline at end of file