diff --git a/Dockerfile b/Dockerfile
index f3625f9..358eadd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM openjdk:8-jre-alpine
 ENV AOZORA_EPUB3 AozoraEpub3-1.1.0b46.zip
 ENV KINDLEGEN kindlegen_linux_2.6_i386_v2_9.tar.gz
-ENV NAROU_VERSION 3.1.11
+ENV NAROU_VERSION 3.2.2
 WORKDIR /opt/narou
 
 RUN apk --update add ruby ruby-io-console ruby-json wget unzip && rm -rf /var/cache/apk/*
@@ -14,7 +14,7 @@ RUN wget http://kindlegen.s3.amazonaws.com/${KINDLEGEN} && \
     tar zxf ${KINDLEGEN} -C /opt/kindlegen && \
     rm ${KINDLEGEN}
 
-COPY narou-${NAROU_VERSION}.gem .
+#COPY narou-${NAROU_VERSION}.gem .
 RUN apk add --no-cache --virtual .ruby-builddeps build-base libffi-dev ruby-dev && \
     gem install narou -v ${NAROU_VERSION} --no-document && \
     apk del .ruby-builddeps
diff --git a/Makefile b/Makefile
index db9a000..0361226 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 
-RELEASE_VERSION = v1.7
+RELEASE_VERSION = v1.8
 VERSION = latest
 
 OPTIONS = \