diff --git a/Makefile b/Makefile
index f74842a5..4bdeb82f 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ build:
 wordcount:
 	docker build -t hadoop-wordcount ./submit
 	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} bde2020/hadoop-base:$(current_branch) hdfs dfs -mkdir -p /input/
-	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} bde2020/hadoop-base:$(current_branch) hdfs dfs -copyFromLocal /opt/hadoop-3.1.1/README.txt /input/
+	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} bde2020/hadoop-base:$(current_branch) hdfs dfs -copyFromLocal /opt/hadoop-3.1.2/README.txt /input/
 	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} hadoop-wordcount
 	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} bde2020/hadoop-base:$(current_branch) hdfs dfs -cat /output/*
 	docker run --network ${DOCKER_NETWORK} --env-file ${ENV_FILE} bde2020/hadoop-base:$(current_branch) hdfs dfs -rm -r /output
diff --git a/base/Dockerfile b/base/Dockerfile
index fe25d725..df68993a 100644
--- a/base/Dockerfile
+++ b/base/Dockerfile
@@ -17,7 +17,7 @@ RUN curl -O https://dist.apache.org/repos/dist/release/hadoop/common/KEYS
 
 RUN gpg --import KEYS
 
-ENV HADOOP_VERSION 3.1.1
+ENV HADOOP_VERSION 3.1.2
 ENV HADOOP_URL https://www.apache.org/dist/hadoop/common/hadoop-$HADOOP_VERSION/hadoop-$HADOOP_VERSION.tar.gz
 
 RUN set -x \
diff --git a/docker-compose-v3.yml b/docker-compose-v3.yml
index e7718196..6e93fb86 100644
--- a/docker-compose-v3.yml
+++ b/docker-compose-v3.yml
@@ -2,7 +2,7 @@ version: '3'
 
 services:
   namenode:
-    image: bde2020/hadoop-namenode:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-namenode:2.0.0-hadoop3.1.2-java8
     networks:
       - hbase
     volumes:
@@ -24,7 +24,7 @@ services:
         traefik.port: 50070
 
   datanode:
-    image: bde2020/hadoop-datanode:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-datanode:2.0.0-hadoop3.1.2-java8
     networks:
       - hbase
     volumes:
@@ -42,7 +42,7 @@ services:
         traefik.port: 50075
 
   resourcemanager:
-    image: bde2020/hadoop-resourcemanager:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-resourcemanager:2.0.0-hadoop3.1.2-java8
     networks:
       - hbase
     environment:
@@ -64,7 +64,7 @@ services:
       disable: true
 
   nodemanager:
-    image: bde2020/hadoop-nodemanager:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-nodemanager:2.0.0-hadoop3.1.2-java8
     networks:
       - hbase
     environment:
@@ -80,7 +80,7 @@ services:
         traefik.port: 8042
 
   historyserver:
-    image: bde2020/hadoop-historyserver:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-historyserver:2.0.0-hadoop3.1.2-java8
     networks:
       - hbase
     volumes:
diff --git a/docker-compose.yml b/docker-compose.yml
index 4f3fa20e..95476412 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@ version: "3"
 
 services:
   namenode:
-    image: bde2020/hadoop-namenode:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-namenode:2.0.0-hadoop3.1.2-java8
     container_name: namenode
     ports:
       - 9870:9870
@@ -14,7 +14,7 @@ services:
       - ./hadoop.env
 
   datanode:
-    image: bde2020/hadoop-datanode:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-datanode:2.0.0-hadoop3.1.2-java8
     container_name: datanode
     volumes:
       - hadoop_datanode:/hadoop/dfs/data
@@ -24,7 +24,7 @@ services:
       - ./hadoop.env
   
   resourcemanager:
-    image: bde2020/hadoop-resourcemanager:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-resourcemanager:2.0.0-hadoop3.1.2-java8
     container_name: resourcemanager
     environment:
       SERVICE_PRECONDITION: "namenode:9870 datanode:9864"
@@ -32,7 +32,7 @@ services:
       - ./hadoop.env
 
   nodemanager1:
-    image: bde2020/hadoop-nodemanager:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-nodemanager:2.0.0-hadoop3.1.2-java8
     container_name: nodemanager
     environment:
       SERVICE_PRECONDITION: "namenode:9870 datanode:9864 resourcemanager:8088"
@@ -40,7 +40,7 @@ services:
       - ./hadoop.env
   
   historyserver:
-    image: bde2020/hadoop-historyserver:2.0.0-hadoop3.1.1-java8
+    image: bde2020/hadoop-historyserver:2.0.0-hadoop3.1.2-java8
     container_name: historyserver
     environment:
       SERVICE_PRECONDITION: "namenode:9870 datanode:9864 resourcemanager:8088"
diff --git a/hadoop.env b/hadoop.env
index 3366abf6..7076e1c8 100644
--- a/hadoop.env
+++ b/hadoop.env
@@ -38,6 +38,6 @@ MAPRED_CONF_mapreduce_map_memory_mb=4096
 MAPRED_CONF_mapreduce_reduce_memory_mb=8192
 MAPRED_CONF_mapreduce_map_java_opts=-Xmx3072m
 MAPRED_CONF_mapreduce_reduce_java_opts=-Xmx6144m
-MAPRED_CONF_yarn_app_mapreduce_am_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.1/
-MAPRED_CONF_mapreduce_map_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.1/
-MAPRED_CONF_mapreduce_reduce_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.1/
+MAPRED_CONF_yarn_app_mapreduce_am_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.2/
+MAPRED_CONF_mapreduce_map_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.2/
+MAPRED_CONF_mapreduce_reduce_env=HADOOP_MAPRED_HOME=/opt/hadoop-3.1.2/