diff --git a/backend/photon.Dockerfile b/backend/photon.Dockerfile
index 7d765ce..3167d8c 100644
--- a/backend/photon.Dockerfile
+++ b/backend/photon.Dockerfile
@@ -1,12 +1,12 @@
 FROM docker.io/eclipse-temurin:21-jdk AS builder
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    git ca-certificates maven \
+    git ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 RUN git clone --depth=1 https://github.com/komoot/photon.git /photon \
     && cd /photon \
-    && mvn -q package -DskipTests
+    && ./gradlew -q assemble
 
 FROM docker.io/eclipse-temurin:21-jre