diff --git a/buildSrc/reaper/build.gradle b/buildSrc/reaper/build.gradle
index d5e8d6ebc7099..4ccbec894e30e 100644
--- a/buildSrc/reaper/build.gradle
+++ b/buildSrc/reaper/build.gradle
@@ -11,6 +11,9 @@
 
 apply plugin: 'java'
 
+targetCompatibility = JavaVersion.VERSION_11
+sourceCompatibility = JavaVersion.VERSION_11
+
 jar {
   archiveFileName = "${project.name}.jar"
   manifest {