diff --git a/src/LiquidCode.Tester.Worker/Dockerfile b/src/LiquidCode.Tester.Worker/Dockerfile
index d37ce2f..b5ba069 100644
--- a/src/LiquidCode.Tester.Worker/Dockerfile
+++ b/src/LiquidCode.Tester.Worker/Dockerfile
@@ -88,9 +88,8 @@ RUN useradd -m -u 1001 -s /bin/bash workeruser && \
     chown -R workeruser:workeruser /var/local/lib/isolate
 
 # Configure isolate
-RUN echo "cg_root = /sys/fs/cgroup" > /usr/local/etc/isolate && \
-    echo "cg_enable = 1" >> /usr/local/etc/isolate && \
-    echo "box_root = /var/local/lib/isolate" >> /usr/local/etc/isolate
+RUN printf "box_root=/var/local/lib/isolate\ncg_root=/sys/fs/cgroup\ncg=1\n" > /usr/local/etc/isolate.conf && \
+    ln -sf /usr/local/etc/isolate.conf /usr/local/etc/isolate
 
 # Copy published app
 COPY --from=publish /app/publish .