diff --git a/CHANGELOG.md b/CHANGELOG.md
index 888dc24..d58d8c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### v3.9.x - [Unreleased]
 
+### v3.9.8.4 - 2019-08-27
+
 #### Added
 
 - cht.sh stack : linux online cheatsheet. Usage : `cheat <command>`. Example for tar : `cheat tar`
@@ -27,6 +29,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - eXplorer filemanager isn't installed with WordOps dashboard anymore, and a flag `--extplorer` is available. But it's still installed when running the command `wo stack install`
 - Template rendering function now check for a .custom file before overwriting a configuration by default.
 - flag `--letsencrypt=subdomain` is not required anymore, you can use `--letsencrypt` or `-le`
+- Simplify APT GPG Keys import
+
+#### Fixed
+
+- typo error in `wo site update` : [PR #126](https://github.com/WordOps/WordOps/pull/126)
 
 ### v3.9.8.3 - 2019-08-21
 
diff --git a/README.md b/README.md
index aaff823..11642d9 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,7 @@
 - Debian 9 (Stretch)
 - Debian 10 (Buster) - Not ready for production
 - Raspbian 9 (Stretch)
+- Raspbian 10 (Buster) - Testing
 
 ## Getting Started
 
diff --git a/wo/cli/plugins/stack_pref.py b/wo/cli/plugins/stack_pref.py
index 82a5c62..5ec4fce 100644
--- a/wo/cli/plugins/stack_pref.py
+++ b/wo/cli/plugins/stack_pref.py
@@ -27,7 +27,7 @@ def pre_pref(self, apt_packages):
     """Pre settings to do before installation packages"""
 
     if (set(WOVariables.wo_mysql).issubset(set(apt_packages)) or
-            set(WOVariables.wo_mysql_client).issubset(set(apt_packages)) or
+            set(WOVariables.wo_mysql_client).issubset(set(apt_packages))):
             set(['mariadb-backup']).issubset(set(apt_packages))):
         # add mariadb repository excepted on raspbian and ubuntu 19.04
         if (not WOVariables.wo_distro == 'raspbian'):
diff --git a/wo/core/apt_repo.py b/wo/core/apt_repo.py
index cfd1f22..2ff2862 100644
--- a/wo/core/apt_repo.py
+++ b/wo/core/apt_repo.py
@@ -82,10 +82,7 @@ class WORepo():
         default keyserver is hkp://keyserver.ubuntu.com
         user can provide other keyserver with keyserver="hkp://xyz"
         """
-        WOShellExec.cmd_exec(self, "gpg --keyserver {serv}"
+        WOShellExec.cmd_exec(self, "apt-key adv --keyserver {serv}"
                              .format(serv=(keyserver or
                                            "hkp://keyserver.ubuntu.com")) +
                              " --recv-keys {key}".format(key=keyids))
-        WOShellExec.cmd_exec(self, "gpg -a --export --armor {0}"
-                             .format(keyids) +
-                             " | apt-key add - ")
diff --git a/wo/core/variables.py b/wo/core/variables.py
index f73e6dd..aa4d4f8 100644
--- a/wo/core/variables.py
+++ b/wo/core/variables.py
@@ -101,9 +101,15 @@ class WOVariables():
             wo_nginx_repo = ("deb http://download.opensuse.org"
                              "/repositories/home:"
                              "/virtubox:/WordOps/Debian_10/ /")
-    else:
-        wo_nginx_repo = ("deb http://download.opensuse.org/repositories/home:"
-                         "/virtubox:/WordOps/Raspbian_9.0/ /")
+    elif wo_distro == 'raspbian':
+        if wo_platform_codename == 'stretch':
+            wo_nginx_repo = ("deb http://download.opensuse.org/"
+                             "repositories/home:"
+                             "/virtubox:/WordOps/Raspbian_9.0/ /")
+        if wo_platform_codename == 'buster':
+            wo_nginx_repo = ("deb http://download.opensuse.org/"
+                             "repositories/home:"
+                             "/virtubox:/WordOps/Raspbian_10/ /")
 
     wo_nginx = ["nginx-custom", "nginx-wo"]
     wo_nginx_key = '188C9FB063F0247A'
@@ -137,14 +143,17 @@ class WOVariables():
                          "http://sfo1.mirrors.digitalocean.com/mariadb/repo/"
                          "10.3/ubuntu {codename} main"
                          .format(codename=wo_platform_codename))
+    if wo_distro == 'raspbian':
+        wo_mysql = ["mariadb-server", "percona-toolkit",
+                    "python3-mysqldb"]
     else:
         wo_mysql_repo = ("deb [arch=amd64,ppc64el] "
                          "http://sfo1.mirrors.digitalocean.com/mariadb/repo/"
                          "10.3/debian {codename} main"
                          .format(codename=wo_platform_codename))
 
-    wo_mysql = ["mariadb-server", "percona-toolkit",
-                "python3-mysqldb", "mariadb-backup"]
+        wo_mysql = ["mariadb-server", "percona-toolkit",
+                    "python3-mysqldb", "mariadb-backup"]
 
     wo_mysql_client = ["mariadb-client", "python3-mysqldb"]