diff --git a/buildroot/Dockerfile.amd64 b/buildroot/Dockerfile.amd64
index 0dbd32e..7160e99 100644
--- a/buildroot/Dockerfile.amd64
+++ b/buildroot/Dockerfile.amd64
@@ -4,7 +4,7 @@ FROM docker.io/hakuturu583/cuda_ros:humble-cuda-12.2.0-devel as build_stage
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN --mount=type=cache,target=/var/lib/apt apt-get update && \
+RUN --mount=type=cache,target=/var/lib/apt,sharing=private apt-get update && \
     apt-get install -y \
     python3-vcstool git python3-colcon-common-extensions python3-rosdep \
     python3-bloom fakeroot \
@@ -15,7 +15,7 @@ RUN mkdir -p /tmp/ws/meta
 COPY package.xml /tmp/ws/meta/package.xml
 COPY rosdep.yaml /tmp/ws/rosdep.yaml
 
-RUN --mount=type=cache,target=/var/lib/apt \
+RUN --mount=type=cache,target=/var/lib/apt,sharing=private \
     echo "yaml file:///tmp/ws/rosdep.yaml" > /etc/ros/rosdep/sources.list.d/61-customized-rosdep.list \
     && rosdep update \
     && rosdep install --from-paths /tmp/ws --ignore-src --rosdistro ${ROS_DISTRO} -y \
diff --git a/buildroot/Dockerfile.arm64 b/buildroot/Dockerfile.arm64
index bae94d8..a313c7c 100644
--- a/buildroot/Dockerfile.arm64
+++ b/buildroot/Dockerfile.arm64
@@ -6,7 +6,7 @@ FROM docker.io/hakuturu583/cuda_ros:lt4-humble-cuda-12.2.2-devel as build_stage
 ENV DEBIAN_FRONTEND=noninteractive
 ENV DENO_NO_UPDATE_CHECK=1
 
-RUN --mount=type=cache,target=/var/lib/apt apt-get update && \
+RUN --mount=type=cache,target=/var/lib/apt,sharing=private apt-get update && \
     apt-get install -y \
     python3-vcstool git python3-colcon-common-extensions python3-rosdep \
     python3-bloom fakeroot \
@@ -17,7 +17,7 @@ RUN mkdir -p /tmp/ws/meta
 COPY package.xml /tmp/ws/meta/package.xml
 COPY rosdep.yaml /tmp/ws/rosdep.yaml
 
-RUN --mount=type=cache,target=/var/lib/apt \
+RUN --mount=type=cache,target=/var/lib/apt,sharing=private \
     echo "yaml file:///tmp/ws/rosdep.yaml" > /etc/ros/rosdep/sources.list.d/61-customized-rosdep.list \
     && rosdep update \
     && rosdep install --from-paths /tmp/ws --ignore-src --rosdistro ${ROS_DISTRO} -y \