diff --git a/Runner.Dockerfile b/Runner.Dockerfile
index c12d90c..d592aef 100644
--- a/Runner.Dockerfile
+++ b/Runner.Dockerfile
@@ -33,4 +33,8 @@ COPY --from=builder /builder/config.docker.yaml /app
 COPY --from=builder /builder/docker-entrypoint.sh /app
 COPY --from=builder /builder/woj /app
 
+# switch user
+RUN chown -R podman:podman /app
+USER podman
+
 ENTRYPOINT ["/app/docker-entrypoint.sh"]
diff --git a/resource/runner/scripts/problem_run.sh b/resource/runner/scripts/problem_run.sh
index 1466242..dc4165a 100755
--- a/resource/runner/scripts/problem_run.sh
+++ b/resource/runner/scripts/problem_run.sh
@@ -61,9 +61,10 @@ for test_num in $(seq "$Info_Num"); do
             --memory_limit=$Info_Limit_Memory \
             --nproc_limit=$Info_Limit_NProc \
             --time_limit=$Info_Limit_Time \
-            --sandbox_path=/woj/framework/scripts/libwoj_sandbox.so \
             --sandbox_template=$3 \
             --sandbox_action=ret \
+            --uid=1000 \
+            --gid=1000 \
             --file_input=/woj/problem/data/input/$test_num.input \
             --file_output=/woj/user/$test_num.out.usr \
             --file_info=/woj/user/$test_num.info \
diff --git a/resource/runner/scripts/ubuntu-full.Dockerfile b/resource/runner/scripts/ubuntu-full.Dockerfile
index 47a2d64..ad7f3cd 100644
--- a/resource/runner/scripts/ubuntu-full.Dockerfile
+++ b/resource/runner/scripts/ubuntu-full.Dockerfile
@@ -1,5 +1,5 @@
 FROM docker.io/library/ubuntu:22.04
-WORKDIR /woj/
+WORKDIR /woj
 
 # Install dependencies
 RUN apt-get update && apt-get upgrade -y && apt-get install -y gcc g++ clang make cmake autoconf m4 libtool gperf git parallel python3 wget && apt-get clean && rm -rf /var/lib/apt/lists
@@ -20,5 +20,3 @@ ENV TEMPLATE=/woj/framework/template
 ENV TESTLIB=/woj/framework/template/testlib
 ENV PREFIX=/woj/problem
 
-# Permission
-USER 1000:1000
diff --git a/resource/runner/scripts/ubuntu-run.Dockerfile b/resource/runner/scripts/ubuntu-run.Dockerfile
index bba5c38..9221fec 100644
--- a/resource/runner/scripts/ubuntu-run.Dockerfile
+++ b/resource/runner/scripts/ubuntu-run.Dockerfile
@@ -1,10 +1,11 @@
 FROM woj/ubuntu-full:latest AS builder
 FROM docker.io/library/ubuntu:22.04
 
-WORKDIR /woj/problem
+WORKDIR /woj
 RUN mkdir -p /woj/framework/scripts
 
 COPY --from=builder /woj/framework/scripts/woj_launcher /woj/framework/scripts/
 
-# Permission
-USER 1000:1000
+# Add User
+RUN groupadd -g 1000 woj && useradd -M -u 1000 -g 1000 woj
+