diff --git a/.github/workflows/lighty-rnc-app/simulator/Dockerfile b/.github/workflows/lighty-rnc-app/simulator/Dockerfile
index 4f8ff08c0..db9041ebd 100644
--- a/.github/workflows/lighty-rnc-app/simulator/Dockerfile
+++ b/.github/workflows/lighty-rnc-app/simulator/Dockerfile
@@ -1,4 +1,4 @@
-ARG SIMULATOR_VERSION="20.1.0"
+ARG SIMULATOR_VERSION="21.0.0"
 
 FROM alpine:3.20.3 as clone