diff --git a/cps/ub.py b/cps/ub.py
index 61787e57..18cd6975 100644
--- a/cps/ub.py
+++ b/cps/ub.py
@@ -179,6 +179,7 @@ class UserBase:
 # User Base (all access methods are declared there)
 class User(UserBase, Base):
     __tablename__ = 'user'
+    __table_args__ = {'sqlite_autoincrement': True}
 
     id = Column(Integer, primary_key=True)
     nickname = Column(String(64), unique=True)
@@ -715,7 +716,34 @@ def migrate_Database():
         conn = engine.connect()
         conn.execute("ALTER TABLE Settings ADD column `config_updatechannel` INTEGER DEFAULT 0")
         session.commit()
-
+    try:
+        # check if one table with autoincrement is existing (should be user table)
+        conn = engine.connect()
+        conn.execute("SELECT COUNT(*) FROM sqlite_sequence WHERE name='user'")
+    except exc.OperationalError:
+        # Create new table user_id and copy contents of table user into it
+        conn = engine.connect()
+        conn.execute("CREATE TABLE user_id (id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,"
+                            "nickname VARCHAR(64),"
+                            "email VARCHAR(120),"
+                            "role SMALLINT,"
+                            "password VARCHAR,"
+                            "kindle_mail VARCHAR(120),"
+                            "locale VARCHAR(2),"
+                            "sidebar_view INTEGER,"
+                            "default_language VARCHAR(3),"
+                            "mature_content BOOLEAN,"
+                            "UNIQUE (nickname),"
+                            "UNIQUE (email),"
+                            "CHECK (mature_content IN (0, 1)))")
+        conn.execute("INSERT INTO user_id(id, nickname, email, role, password, kindle_mail,locale,"
+                        "sidebar_view, default_language, mature_content) "
+                     "SELECT id, nickname, email, role, password, kindle_mail, locale,"
+                        "sidebar_view, default_language, mature_content FROM user")
+        # delete old user table and rename new user_id table to user:
+        conn.execute("DROP TABLE user")
+        conn.execute("ALTER TABLE user_id RENAME TO user")
+        session.commit()
 
     # Remove login capability of user Guest
     conn = engine.connect()
diff --git a/readme.md b/readme.md
index f06d50da..bc314c02 100644
--- a/readme.md
+++ b/readme.md
@@ -56,20 +56,30 @@ Optionally, to enable on-the-fly conversion from one ebook format to another whe
 
 [Download](http://www.amazon.com/gp/feature.html?docId=1000765211) Amazon's KindleGen tool for your platform and place the binary named as `kindlegen` in the `vendor` folder.
 
-## Docker images
+## Docker Images
 
-Pre-built Docker images based on Alpine Linux are available in these Docker Hub repositories:
+Pre-built Docker images are available in these Docker Hub repositories:
 
-**x64**
-+ **technosoft2000** at [technosoft2000/calibre-web](https://hub.docker.com/r/technosoft2000/calibre-web/). If you want the option to convert/download ebooks in multiple formats, use this image as it includes Calibre's ebook-convert binary. The "path to convertertool" should be set to /opt/calibre/ebook-convert.
-+ **linuxserver.io** at [linuxserver/calibre-web](https://hub.docker.com/r/linuxserver/calibre-web/). Cannot convert between ebook formats.
+#### **Technosoft2000 - x64**
++ Docker Hub - [https://hub.docker.com/r/technosoft2000/calibre-web/](https://hub.docker.com/r/technosoft2000/calibre-web/)
++ Github - [https://github.com/Technosoft2000/docker-calibre-web](https://github.com/Technosoft2000/docker-calibre-web) 
 
-**armhf**
-+ **linuxserver.io** at [lsioarmhf/calibre-web](https://hub.docker.com/r/lsioarmhf/calibre-web/)
+    Includes the Calibre `ebook-convert` binary.
+    + The "path to convertertool" should be set to `/opt/calibre/ebook-convert`
 
-**aarch64**
-+ **linuxserver.io** at [lsioarmhf/calibre-web-aarch64](https://hub.docker.com/r/lsioarmhf/calibre-web-aarch64)
+#### **LinuxServer - x64, armhf, aarch64**
++ Docker Hub - [https://hub.docker.com/r/linuxserver/calibre-web/](https://hub.docker.com/r/linuxserver/calibre-web/)
++ Github - [https://github.com/linuxserver/docker-calibre-web](https://github.com/linuxserver/docker-calibre-web)
++ Github - (Optional Calibre layer) - [https://github.com/linuxserver/docker-calibre-web/tree/calibre](https://github.com/linuxserver/docker-calibre-web/tree/calibre) 
+
+   This image has the option to pull in an extra docker manifest layer to include the Calibre `ebook-convert` binary.  Just include the environmental variable `DOCKER_MODS=linuxserver/calibre-web:calibre` in your docker run/docker compose file. **(x64 only)**
+  
+   If you do not need this functionality then this can be omitted, keeping the image as lightweight as possible.
+    
+   Both the Calibre-Web and Calibre-Mod images are rebuilt automatically on new releases of Calibre-Web and Calibre respectively, and on updates to any included base image packages on a weekly basis if required.
+   + The "path to convertertool" should be set to `/usr/bin/ebook-convert`
+   + The "path to unrar" should be set to `/usr/bin/unrar`
 
 # Wiki
 
-For further informations, How To's and FAQ please check the ![Wiki](../../wiki)
+For further informations, How To's and FAQ please check the ![Wiki](../../wiki)
\ No newline at end of file