diff --git a/ambari/Dockerfile b/ambari/Dockerfile
index f360965..408dfec 100644
--- a/ambari/Dockerfile
+++ b/ambari/Dockerfile
@@ -2,10 +2,33 @@
 # Dockerfile for ambari
 #
 
+FROM ubuntu:18.04 AS build
+
+ENV AMBARI_VERSION=2.7.6
+ENV AMBARI_BUILD_NUMBER=388e072381e71c7755673b7743531c03a4d61be8
+
+SHELL ["/bin/bash", "-c"]
+
+RUN set -xe \
+    && apt-get update \
+    && apt-get install -y python maven node npm wget \
+    && npm install --global yarn \
+    && wget https://www-eu.apache.org/dist/ambari/ambari-$AMBARI_VERSION/apache-ambari-$AMBARI_VERSION-src.tar.gz \
+    && tar xfvz apache-ambari-$AMBARI_VERSION-src.tar.gz \
+    && cd apache-ambari-$AMBARI_VERSION-src \
+    && mvn versions:set -DnewVersion=$AMBARI_VERSION.0.0 \
+    && pushd ambari-metrics \
+    && mvn versions:set -DnewVersion=$AMBARI_VERSION.0.0 \
+    && popd \
+    && mvn -B clean install jdeb:jdeb -DnewVersion=$AMBARI_VERSION.0.0 -DbuildNumber=$AMBARI_BUILD_NUMBER -DskipTests -Dpython.ver="python >= 2.6" \
+    && find . -name '*.deb'
+
+# TODO
+
 FROM ubuntu:18.04
 MAINTAINER EasyPi Software Foundation
 
-ENV AMBARI_VERSION=2.7.5.0
+ENV AMBARI_VERSION=2.7.6.0
 ENV AMBARI_SOURCE=http://public-repo-1.hortonworks.com/ambari/ubuntu18/2.x/updates/${AMBARI_VERSION}/ambari.list
 ENV JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
 
diff --git a/ambari/docker-compose.yml b/ambari/docker-compose.yml
index 535c064..0db14cb 100644
--- a/ambari/docker-compose.yml
+++ b/ambari/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3.7"
+version: "3.8"
 
 services:
 
@@ -21,7 +21,7 @@ services:
     restart: unless-stopped
 
   postgres:
-    image: postgres:alpine
+    image: postgres:14-alpine
     volumes:
       - ./data/postgres:/var/lib/postgresql/data
     environment:
diff --git a/semaphore/docker-compose.yml b/semaphore/docker-compose.yml
index 2211482..f2bf610 100644
--- a/semaphore/docker-compose.yml
+++ b/semaphore/docker-compose.yml
@@ -9,11 +9,12 @@ services:
     volumes:
       - ./data/semaphore:/etc/semaphore
     environment:
+      SEMAPHORE_DB_DIALECT: postgres
       SEMAPHORE_DB_USER: semaphore
       SEMAPHORE_DB_PASS: semaphore
       SEMAPHORE_DB_HOST: postgres
-      SEMAPHORE_DB_PORT: 3306
-      SEMAPHORE_DB: semaphore
+      SEMAPHORE_DB_PORT: 5432
+      SEMAPHORE_DB: semaphore?sslmode=disable
       SEMAPHORE_PLAYBOOK_PATH: /tmp/semaphore/
       SEMAPHORE_ADMIN: admin
       SEMAPHORE_ADMIN_NAME: admin