diff --git a/graphite/README.md b/graphite/README.md
index d48ff4b..5bac664 100644
--- a/graphite/README.md
+++ b/graphite/README.md
@@ -58,6 +58,7 @@ $ tree -F -L 4
 │   │   ├── rewrite-rules.conf
 │   │   └── storage-schemas.conf
 │   └── storage/
+│       ├── carbon-aggregator-a.pid
 │       ├── carbon-cache-a.pid
 │       ├── graphite.db
 │       ├── log/
@@ -69,6 +70,9 @@ $ tree -F -L 4
 $ curl http://localhost:8080
 ```
 
+> :warning: Stale pid files may prevent services from starting.
+> Please delete these pid files manually before restarting or upgrading container.
+
 ## storage-schemas.conf
 
 ```ini
diff --git a/hubot/Dockerfile b/hubot/Dockerfile
index e422119..a0cef17 100644
--- a/hubot/Dockerfile
+++ b/hubot/Dockerfile
@@ -2,8 +2,8 @@
 # Dockerfile for hubot
 #
 
-FROM alpine
-MAINTAINER kev <noreply@easypi.pro>
+FROM alpine:3
+MAINTAINER EasyPi Software Foundation
 
 ENV HUBOT_NAME=Hubot
 ENV HUBOT_ADAPTER=slack
@@ -35,7 +35,7 @@ RUN set -xe \
 
 VOLUME /home/hobot \
        /usr/local/bin \
-       /usr/lib/python3.7/site-packages
+       /usr/lib/python3.8/site-packages
 
 EXPOSE 8080
 
diff --git a/hubot/arm/Dockerfile b/hubot/arm/Dockerfile
index 4464d68..8101981 100644
--- a/hubot/arm/Dockerfile
+++ b/hubot/arm/Dockerfile
@@ -11,7 +11,7 @@ ENV HUBOT_DESCRIPTION=$HUBOT_NAME-$HUBOT_ADAPTER
 ENV HUBOT_SLACK_TOKEN=
 
 RUN set -xe \
-    && apk add --update ca-certificates nodejs nodejs-npm \
+    && apk add --update ca-certificates nodejs nodejs-npm python3 \
     && npm install -g yo generator-hubot \
     && adduser -s /bin/sh -D hubot
 
@@ -33,7 +33,10 @@ RUN set -xe \
                           url \
     && sed -i -r 's/^\s+#//' scripts/example.coffee
 
-VOLUME /home/hobot
+VOLUME /home/hobot \
+       /usr/local/bin \
+       /usr/lib/python3.8/site-packages
+
 EXPOSE 8080
 
 CMD ["./bin/hubot", "--adapter", "slack"]
diff --git a/hubot/docker-compose.yml b/hubot/docker-compose.yml
index 22ea520..bdd92c2 100644
--- a/hubot/docker-compose.yml
+++ b/hubot/docker-compose.yml
@@ -6,4 +6,4 @@ hubot:
     - ./data:/home/hubot/scripts
   environment:
     - HUBOT_SLACK_TOKEN=xoxb-xxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxx
-  restart: always
+  restart: unless-stopped
diff --git a/selenoid/README.md b/selenoid/README.md
index a6a322c..bf00c40 100644
--- a/selenoid/README.md
+++ b/selenoid/README.md
@@ -27,27 +27,27 @@ Required Images
 - aerokube/selenoid:latest-release
 - aerokube/selenoid-ui:latest-release
 - selenoid/video-recorder:latest-release
-- selenoid/chrome:79.0
-- selenoid/firefox:72.0
-- selenoid/vnc:chrome_79.0
-- selenoid/vnc:firefox_72.0
+- selenoid/chrome:80.0
+- selenoid/firefox:74.0
+- selenoid/vnc:chrome_80.0
+- selenoid/vnc:firefox_74.0
 
 ```json
 {
   "chrome": {
-    "default": "79.0",
+    "default": "80.0",
     "versions": {
-      "79.0": {
-        "image": "selenoid/vnc:chrome_79.0",
+      "80.0": {
+        "image": "selenoid/vnc:chrome_80.0",
         "port": "4444"
       }
     }
   },
   "firefox": {
-    "default": "72.0",
+    "default": "74.0",
     "versions": {
-      "72.0": {
-        "image": "selenoid/vnc:firefox_72.0",
+      "74.0": {
+        "image": "selenoid/vnc:firefox_74.0",
         "port": "4444"
       }
     }
@@ -62,7 +62,7 @@ from selenium import webdriver
 
 capabilities = {
     "browserName": "chrome",
-    "version": "79.0",
+    "version": "80.0",
     "enableVNC": True,
     "enableVideo": False
 }
diff --git a/selenoid/data/config/browsers.json b/selenoid/data/config/browsers.json
index 69a467b..852ce1b 100644
--- a/selenoid/data/config/browsers.json
+++ b/selenoid/data/config/browsers.json
@@ -1,18 +1,18 @@
 {
   "chrome": {
-    "default": "79.0",
+    "default": "80.0",
     "versions": {
-      "79.0": {
-        "image": "selenoid/vnc:chrome_79.0",
+      "80.0": {
+        "image": "selenoid/vnc:chrome_80.0",
         "port": "4444"
       }
     }
   },
   "firefox": {
-    "default": "72.0",
+    "default": "74.0",
     "versions": {
-      "72.0": {
-        "image": "selenoid/vnc:firefox_72.0",
+      "74.0": {
+        "image": "selenoid/vnc:firefox_74.0",
         "port": "4444"
       }
     }