diff --git a/pinpoint-agent/Dockerfile b/pinpoint-agent/Dockerfile
index 8a06a1b..c224add 100644
--- a/pinpoint-agent/Dockerfile
+++ b/pinpoint-agent/Dockerfile
@@ -10,17 +10,16 @@ ADD configure-agent.sh /usr/local/bin/
 
 RUN apk add --update curl bash \
     && chmod a+x /usr/local/bin/configure-agent.sh \
-    && mkdir -p /assets \
+    && mkdir -p /assets/pinpoint-agent \
     && curl -SL https://raw.githubusercontent.com/naver/pinpoint/$PINPOINT_VERSION/agent/src/main/resources/pinpoint.config -o /assets/pinpoint.config \
     && curl -SL https://github.com/naver/pinpoint/releases/download/$PINPOINT_VERSION/pinpoint-agent-$PINPOINT_VERSION.tar.gz -o pinpoint-agent-$PINPOINT_VERSION.tar.gz \
     && gunzip pinpoint-agent-$PINPOINT_VERSION.tar.gz \
-    && tar -xf pinpoint-agent-$PINPOINT_VERSION.tar -C /assets \
-    && if test -d /assets/pinpoint-agent-$PINPOINT_VERSION; then mv /assets/pinpoint-agent-$PINPOINT_VERSION /assets/pinpoint-agent; fi \
-    && sed -i 's/DEBUG/INFO/' /assets/lib/log4j.xml \
+    && tar -xf pinpoint-agent-$PINPOINT_VERSION.tar -C /assets/pinpoint-agent \
+    && sed -i 's/DEBUG/INFO/' /assets/pinpoint-agent/lib/log4j.xml \
     && rm pinpoint-agent-$PINPOINT_VERSION.tar \
     && apk del curl \
     && rm /var/cache/apk/*
 
-VOLUME /assets/pinpoint-agent
+VOLUME ["/assets/pinpoint-agent"]
 
 ENTRYPOINT ["/usr/local/bin/configure-agent.sh"]