diff --git a/resource/runner/framework/scripts/setup.sh b/resource/runner/framework/scripts/setup.sh
index e97e402..07acf19 100755
--- a/resource/runner/framework/scripts/setup.sh
+++ b/resource/runner/framework/scripts/setup.sh
@@ -10,6 +10,5 @@ cmake .. -DCMAKE_BUILD_TYPE=Release || exit 1
 make -j || exit 1
 
 cd ../..
-cp woj-sandbox/build/libwoj_sandbox.so . || exit 1
 cp woj-sandbox/build/woj_launcher . || exit 1
 rm -rf woj-sandbox || exit 1
diff --git a/resource/runner/scripts/problem_run.sh b/resource/runner/scripts/problem_run.sh
index b23ba71..1466242 100755
--- a/resource/runner/scripts/problem_run.sh
+++ b/resource/runner/scripts/problem_run.sh
@@ -63,7 +63,7 @@ for test_num in $(seq "$Info_Num"); do
             --time_limit=$Info_Limit_Time \
             --sandbox_path=/woj/framework/scripts/libwoj_sandbox.so \
             --sandbox_template=$3 \
-            --sandbox_action=nothing \
+            --sandbox_action=ret \
             --file_input=/woj/problem/data/input/$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 a7391da..3a7c1f3 100644
--- a/resource/runner/scripts/ubuntu-full.Dockerfile
+++ b/resource/runner/scripts/ubuntu-full.Dockerfile
@@ -18,3 +18,6 @@ ENV WOJ_SANDBOX=/woj/framework/scripts/libwoj_sandbox.so
 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 44839ba..bba5c38 100644
--- a/resource/runner/scripts/ubuntu-run.Dockerfile
+++ b/resource/runner/scripts/ubuntu-run.Dockerfile
@@ -4,5 +4,7 @@ FROM docker.io/library/ubuntu:22.04
 WORKDIR /woj/problem
 RUN mkdir -p /woj/framework/scripts
 
-COPY --from=builder /woj/framework/scripts/libwoj_sandbox.so /woj/framework/scripts/
 COPY --from=builder /woj/framework/scripts/woj_launcher /woj/framework/scripts/
+
+# Permission
+USER 1000:1000