diff --git a/Dockerfile b/Dockerfile
index 9b26466..0a8d7c6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,9 +7,9 @@ ENV HOME /root
 RUN apt-get update && apt-get -y install wget curl git build-essential libtool autoconf pkgconf
 RUN apt-get install -q -y mysql-server libmysqld-dev
 
-# install go1.9.3
-RUN wget https://dl.google.com/go/go1.9.3.linux-amd64.tar.gz
-RUN tar -C /usr/local -xzf go1.9.3.linux-amd64.tar.gz
+# install go1.11.9
+RUN wget https://dl.google.com/go/go1.11.9.linux-amd64.tar.gz
+RUN tar -C /usr/local -xzf go1.11.9.linux-amd64.tar.gz
 
 RUN mkdir $HOME/go
 
@@ -30,7 +30,7 @@ RUN echo '/usr/local/lib' >> /etc/ld.so.conf
 WORKDIR $HOME
 RUN git clone https://github.com/obgm/libcoap.git
 WORKDIR $HOME/libcoap
-RUN git checkout 1365dea39a6129a9b7e8c579537e12ffef1558f6
+RUN git checkout 1eadd91366cab46767f26e4d10e005198246eac1
 RUN ./autogen.sh
 RUN ./configure --disable-documentation --with-openssl
 RUN make && make install
@@ -40,4 +40,4 @@ RUN ldconfig
 WORKDIR $HOME
 RUN go get -u github.com/nttdots/go-dots/...
 WORKDIR $GOPATH/src/github.com/nttdots/go-dots/
-RUN make && make install
\ No newline at end of file
+RUN make && make install
diff --git a/dots_client/entry_point.sh b/dots_client/entry_point.sh
old mode 100644
new mode 100755
diff --git a/example/dots_client/docker-compose.yml b/example/dots_client/docker-compose.yml
index 122ad49..b1463f0 100644
--- a/example/dots_client/docker-compose.yml
+++ b/example/dots_client/docker-compose.yml
@@ -5,7 +5,7 @@ services:
         container_name: dots_client
         build: ../../
         image: dots_base
-        working_dir: /go/src/github.com/nttdots/go-dots
+        working_dir: /root/go/src/github.com/nttdots/go-dots
         entrypoint: ./dots_client/entry_point.sh
         networks:
           - dots_client_net
diff --git a/example/dots_server/docker-compose.yml b/example/dots_server/docker-compose.yml
index d7f6303..43d3ed8 100644
--- a/example/dots_server/docker-compose.yml
+++ b/example/dots_server/docker-compose.yml
@@ -12,7 +12,7 @@ services:
         ports:
           - 4646:4646/udp
           - 4647:4647/udp
-        working_dir: /go/src/github.com/nttdots/go-dots/dots_server
+        working_dir: /root/go/src/github.com/nttdots/go-dots/dots_server
         entrypoint: ./entry_point.sh
         volumes:
           - ./config/dots_server.yaml:/etc/dots_server.yaml:ro
diff --git a/example/onebox/docker-compose.yml b/example/onebox/docker-compose.yml
index 196a5b7..3ad3429 100644
--- a/example/onebox/docker-compose.yml
+++ b/example/onebox/docker-compose.yml
@@ -10,7 +10,7 @@ services:
             ipv6_address: 2001:db8::8
         depends_on:
           - dots_server
-        working_dir: /go/src/github.com/nttdots/go-dots
+        working_dir: /root/go/src/github.com/nttdots/go-dots
         entrypoint: ./dots_client/entry_point.sh
         environment:
           - DOTS_SERVER=2001:db8::9
@@ -28,7 +28,7 @@ services:
           dots_net:
             ipv4_address: 172.16.238.11
             ipv6_address: 2001:db8::9
-        working_dir: /go/src/github.com/nttdots/go-dots/dots_server
+        working_dir: /root/go/src/github.com/nttdots/go-dots/dots_server
         command: dots_server -vv -config /etc/dots_server.yaml
         volumes:
           - ./config/dots_server.yaml:/etc/dots_server.yaml:ro
diff --git a/gobgp-server/Dockerfile b/gobgp-server/Dockerfile
index 7c056d6..15d7417 100644
--- a/gobgp-server/Dockerfile
+++ b/gobgp-server/Dockerfile
@@ -6,8 +6,8 @@ WORKDIR /root
 RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get install -y git gcc wget && \
-    wget https://storage.googleapis.com/golang/go1.8.linux-amd64.tar.gz && \
-    tar xf go1.8.linux-amd64.tar.gz  -C /usr/local/ && rm go1.8.linux-amd64.tar.gz && \
+    wget https://dl.google.com/go/go1.11.9.linux-amd64.tar.gz && \
+    tar xf go1.11.9.linux-amd64.tar.gz  -C /usr/local/ && rm go1.11.9.linux-amd64.tar.gz && \
     ln -s /usr/local/go/bin/go /usr/local/bin/go&&  \
     go get github.com/osrg/gobgp/...