diff --git a/.github/workflows/lighty-rnc-app/simulator/Dockerfile b/.github/workflows/lighty-rnc-app/simulator/Dockerfile
index bd24b84787..62c0677a04 100644
--- a/.github/workflows/lighty-rnc-app/simulator/Dockerfile
+++ b/.github/workflows/lighty-rnc-app/simulator/Dockerfile
@@ -1,17 +1,27 @@
+ARG SIMULATOR_VERSION="17.3.0"
+
 FROM alpine:3.18.3 as clone
+
+ARG SIMULATOR_VERSION
+RUN echo MY_VAR value is ${SIMULATOR_VERSION}
 RUN apk add git
 WORKDIR /netconf-simulator
-RUN git clone https://github.com/PANTHEONtech/lighty-netconf-simulator.git -b 17.3.0
+RUN git clone https://github.com/PANTHEONtech/lighty-netconf-simulator.git -b $SIMULATOR_VERSION
 
 FROM maven:3.8-eclipse-temurin-17-alpine as build
+ARG SIMULATOR_VERSION
 WORKDIR /lighty-netconf-simulator
 COPY --from=clone /netconf-simulator/lighty-netconf-simulator /lighty-netconf-simulator
 RUN mvn -B install -DskipTests
+RUN echo MY_VAR value is $SIMULATOR_VERSION
 
 FROM eclipse-temurin:17-jre-alpine
+ARG SIMULATOR_VERSION
 WORKDIR /lighty-netconf-simulator
 COPY --from=build /lighty-netconf-simulator/examples/devices/lighty-network-topology-device/target/ /lighty-netconf-simulator/target
 
 EXPOSE 17380
+RUN echo MY_VAR value is $SIMULATOR_VERSION
+
 
-ENTRYPOINT ["java", "-jar", "/lighty-netconf-simulator/target/lighty-network-topology-device-17.3.0.jar"]
+ENTRYPOINT java -jar /lighty-netconf-simulator/target/lighty-network-topology-device-${SIMULATOR_VERSION}.jar