diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
index b05016b..368673b 100644
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -24,7 +24,9 @@ services:
       - osrm-cycling
 
   postgres:
-    image: docker.io/postgis/postgis:16-3.4
+    build:
+      context: .
+      dockerfile: postgis.Dockerfile
     ports:
       - "5432:5432"
     environment:
diff --git a/backend/postgis.Dockerfile b/backend/postgis.Dockerfile
new file mode 100644
index 0000000..5baba25
--- /dev/null
+++ b/backend/postgis.Dockerfile
@@ -0,0 +1,7 @@
+FROM arm64v8/postgres:16-bookworm
+
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      postgresql-16-postgis-3 \
+      postgresql-16-postgis-3-scripts \
+ && rm -rf /var/lib/apt/lists/*