diff --git a/tools/refdiff/Dockerfile b/tools/refdiff/Dockerfile
index 55f23a3..853d3e2 100644
--- a/tools/refdiff/Dockerfile
+++ b/tools/refdiff/Dockerfile
@@ -10,7 +10,7 @@ COPY . .
 RUN gradle jar --no-daemon
 
 
-FROM amazoncorretto:21 AS runner
+FROM amazoncorretto:22 AS runner
 
 WORKDIR /work