diff --git a/dictation_client/.devcontainer/Dockerfile b/dictation_client/.devcontainer/Dockerfile
index 5e980cb..1a369c6 100644
--- a/dictation_client/.devcontainer/Dockerfile
+++ b/dictation_client/.devcontainer/Dockerfile
@@ -17,10 +17,6 @@ RUN bash /tmp/library-scripts/common-debian.sh "${INSTALL_ZSH}" "${USERNAME}" "$
     && apt-get install default-jre -y \
     && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts
 
-
-# Update NPM
-RUN npm install -g npm
-
 # Install mob
 RUN curl -sL install.mob.sh | sh
 
diff --git a/dictation_function/.devcontainer/Dockerfile b/dictation_function/.devcontainer/Dockerfile
index 97e310d..6996bde 100644
--- a/dictation_function/.devcontainer/Dockerfile
+++ b/dictation_function/.devcontainer/Dockerfile
@@ -39,9 +39,6 @@ RUN mkdir -p /tmp/gotools \
     && mv /tmp/gotools/bin/* ${TARGET_GOPATH}/bin/ \
     && rm -rf /tmp/gotools 
 
-# Update NPM
-RUN npm install -g npm
-
 # 以下 ユーザー権限で実施
 USER $USERNAME
 # copy init-script
diff --git a/dictation_server/.devcontainer/Dockerfile b/dictation_server/.devcontainer/Dockerfile
index cd636c4..725f5a9 100644
--- a/dictation_server/.devcontainer/Dockerfile
+++ b/dictation_server/.devcontainer/Dockerfile
@@ -37,9 +37,6 @@ RUN mkdir -p /tmp/gotools \
     && mv /tmp/gotools/bin/* ${TARGET_GOPATH}/bin/ \
     && rm -rf /tmp/gotools 
 
-# Update NPM
-RUN npm install -g npm
-
 # Install NestJS
 RUN npm i -g @nestjs/cli