diff --git a/9.4/Dockerfile b/9.4/Dockerfile
index 27ff03e13a..4584ec2bce 100644
--- a/9.4/Dockerfile
+++ b/9.4/Dockerfile
@@ -16,8 +16,9 @@ RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/* \
 
 # make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
 RUN apt-get update && apt-get install -y locales && rm -rf /var/lib/apt/lists/* \
-	&& localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
-ENV LANG en_US.utf8
+	&& localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8 \
+	&& localedef -i ko_KR -c -f UTF-8 -A /usr/share/locale/locale.alias ko_KR.UTF-8
+ENV LANG ko_KR.utf8
 
 RUN mkdir /docker-entrypoint-initdb.d
 
@@ -38,6 +39,12 @@ RUN apt-get update \
 
 RUN mkdir -p /var/run/postgresql && chown -R postgres /var/run/postgresql
 
+# PLv8
+RUN apt-get update && apt-get install -y postgresql-9.4-plv8 && rm -rf /var/lib/apt/lists/*
+
+# Vim
+RUN apt-get update && apt-get install -y vim && rm -rf /var/lib/apt/lists/*
+
 ENV PATH /usr/lib/postgresql/$PG_MAJOR/bin:$PATH
 ENV PGDATA /var/lib/postgresql/data
 VOLUME /var/lib/postgresql/data