diff --git a/Dockerfile b/Dockerfile
index cbadc74..b8e0949 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,12 +21,11 @@ RUN \
 
 # install ubooquity
  mkdir -p \
-	/opt/ubooquity \
-	/opt/ubooquity/fonts && \
+	/app/ubooquity && \
  curl -o \
  /tmp/ubooquity.zip -L \
 	"http://vaemendis.net/ubooquity/downloads/Ubooquity-${UBOOQUITY_VER}.zip" && \
- unzip /tmp/ubooquity.zip -d /opt/ubooquity && \
+ unzip /tmp/ubooquity.zip -d /app/ubooquity && \
 
 # cleanup
  apk del --purge \
@@ -38,5 +37,5 @@ RUN \
 COPY root/ /
 
 # ports and volumes
-EXPOSE 2202 2205
+EXPOSE 2202 2203
 VOLUME /books /comics /config /files
diff --git a/README.md b/README.md
index 5a18e62..252ce98 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ docker create \
   -e MAXMEM=<maxmem> \
   -e PGID=<gid> -e PUID=<uid>  \
   -p 2202:2202 \
-  -p 2205:2205 \
+  -p 2203:2203 \
   linuxserver/ubooquity
 ```
 
@@ -45,7 +45,7 @@ http://192.168.x.x:8080 would show you what's running INSIDE the container on po
 
 
 * `-p 2202` - the library port
-* `-p 2205` - the admin port
+* `-p 2203` - the admin port
 * `-v /config` - Config files and database for ubooquity
 * `-v /books` - Location of books.
 * `-v /comics` - Location of comics.
@@ -80,9 +80,9 @@ In this instance `PUID=1001` and `PGID=1001`. To find yours use `id user` as bel
 This container will automatically scan your files at startup.
 
 **IMPORTANT**
-Access the admin page at `http://<your-ip>:2205/ubooquity/admin/` and set a password. 
+Access the admin page at `http://<your-ip>:2203/ubooquity/admin/` and set a password. 
 
-Then you can access the webui at `http://<your-ip>:2205/ubooquity/`
+Then you can access the webui at `http://<your-ip>:2203/ubooquity/`
 
 
 ## Info
diff --git a/root/defaults/preferences.json b/root/defaults/preferences.json
new file mode 100644
index 0000000..040f9fd
--- /dev/null
+++ b/root/defaults/preferences.json
@@ -0,0 +1,47 @@
+{
+  "filesPaths" : [ {
+    "pathString" : "/files",
+    "userName" : [ ]
+  } ],
+  "comicsPaths" : [ {
+    "pathString" : "/comics",
+    "userName" : [ ]
+  } ],
+  "booksPaths" : [ {
+    "pathString" : "/books",
+    "userName" : [ ]
+  } ],
+  "users" : [ ],
+  "isFilesProviderEnabled" : true,
+  "isComicsProviderEnabled" : true,
+  "isBooksProviderEnabled" : true,
+  "isUserManagementEnabled" : false,
+  "libraryPortNumber" : 2202,
+  "adminPortNumber" : 2203,
+  "comicWidth" : 160,
+  "comicHeight" : 230,
+  "comicsPaginationNumber" : 30,
+  "bookWidth" : 160,
+  "bookHeight" : 230,
+  "booksPaginationNumber" : 30,
+  "minimizeToTray" : false,
+  "minimizeOnStartup" : false,
+  "autoscanPeriod" : 0,
+  "isRemoteAdminEnabled" : false,
+  "theme" : "default",
+  "isShrinkingCacheEnabled" : false,
+  "shrunkPageWidth" : 1536,
+  "shrunkPageHeight" : 2500,
+  "shrinkingCachePath" : "",
+  "autoScanAtLaunch" : true,
+  "reverseProxyPrefix" : "",
+  "keystorePath" : "",
+  "keystorePassword" : "",
+  "isOpdsProviderEnabled" : false,
+  "folderExclusionPattern" : "",
+  "bypassSingleRootFolder" : false,
+  "enableFolderMetadataDisplay" : false,
+  "bookmarkUsingCookies" : false,
+  "displayTitleInsteadOfFileName" : false,
+  "keepUnreachableSharedFolders" : false
+}
\ No newline at end of file
diff --git a/root/defaults/preferences.xml b/root/defaults/preferences.xml
deleted file mode 100644
index 37fc999..0000000
--- a/root/defaults/preferences.xml
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<userPreferences>
-    <filesPaths/>
-    <comicsPaths>
-        <path>
-            <pathString>/comics</pathString>
-            <authorizedUsers/>
-        </path>
-    </comicsPaths>
-    <booksPaths>
-        <path>
-            <pathString>/books</pathString>
-            <authorizedUsers/>
-        </path>
-    </booksPaths>
-    <users/>
-    <isFilesProviderEnabled>true</isFilesProviderEnabled>
-    <isComicsProviderEnabled>true</isComicsProviderEnabled>
-    <isBooksProviderEnabled>true</isBooksProviderEnabled>
-    <isUserManagementEnabled>false</isUserManagementEnabled>
-    <portNumber>2202</portNumber>
-    <comicWidth>160</comicWidth>
-    <comicHeight>230</comicHeight>
-    <comicsPaginationNumber>30</comicsPaginationNumber>
-    <bookWidth>160</bookWidth>
-    <bookHeight>230</bookHeight>
-    <booksPaginationNumber>30</booksPaginationNumber>
-    <minimizeToTray>false</minimizeToTray>
-    <minimizeOnStartup>false</minimizeOnStartup>
-    <autoscanPeriod>0</autoscanPeriod>
-    <isWebAdminEnabled>false</isWebAdminEnabled>
-    <theme>Default</theme>
-    <isShrinkingCacheEnabled>false</isShrinkingCacheEnabled>
-    <shrunkPageWidth>1536</shrunkPageWidth>
-    <shrunkPageHeight>2400</shrunkPageHeight>
-    <shrinkingCachePath></shrinkingCachePath>
-    <autoScanAtLaunch>true</autoScanAtLaunch>
-    <reverseProxyPrefix>ubooquity</reverseProxyPrefix>
-    <keystorePath></keystorePath>
-    <keystorePassword></keystorePassword>
-    <isOpdsProviderEnabled>true</isOpdsProviderEnabled>
-    <hideEmptyFolder>false</hideEmptyFolder>
-    <folderExclusionPattern></folderExclusionPattern>
-    <bypassSingleRootFolder>false</bypassSingleRootFolder>
-    <enableFolderMetadataDisplay>false</enableFolderMetadataDisplay>
-</userPreferences>
diff --git a/root/etc/cont-init.d/30-config b/root/etc/cont-init.d/30-config
index c1b300e..1a4425d 100644
--- a/root/etc/cont-init.d/30-config
+++ b/root/etc/cont-init.d/30-config
@@ -4,11 +4,11 @@
 mkdir -p \
 	config/fonts
 
-# copy config
-[[ ! -e /config/preferences.xml ]] && \
-	cp /defaults/preferences.xml /config/preferences.xml
+# copy config
+[[ ! -e /config/preferences.json ]] && \
+	cp /defaults/preferences.json /config/preferences.json
 
 # permissions
 chown -R abc:abc \
 	/config \
-	/opt/ubooquity
+	/app/ubooquity
diff --git a/root/etc/services.d/ubooquity/run b/root/etc/services.d/ubooquity/run
index 072736f..3246cf4 100644
--- a/root/etc/services.d/ubooquity/run
+++ b/root/etc/services.d/ubooquity/run
@@ -2,12 +2,11 @@
 
 JAVAMEM=${MAXMEM:-512}
 
-cd /opt/ubooquity || exit
+cd /app/ubooquity || exit
 
 exec \
 	s6-setuidgid abc java -Xmx"$JAVAMEM"m \
-	-jar /opt/ubooquity/Ubooquity.jar \
+	-jar /app/ubooquity/Ubooquity.jar \
 	--headless --host 0.0.0.0 \
-	--libraryport 2202 --adminport 2205 \
   --remoteadmin \
 	--workdir /config