diff --git a/Makefile b/Makefile
index e810daa7..281ad012 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ PROJECT_NAME=$(shell basename "${ROOT}")
 # - pkg/version/current.go
 #
 # Use `tools/bump_version.sh` script to change all those files at one shot.
-VERSION="3.8.4"
+VERSION="3.9.0"
 
 # Build binaries and installation packages.
 .PHONY: build
diff --git a/build/package/mieru/amd64/debian/DEBIAN/control b/build/package/mieru/amd64/debian/DEBIAN/control
index 18cec8cc..3366e2a0 100755
--- a/build/package/mieru/amd64/debian/DEBIAN/control
+++ b/build/package/mieru/amd64/debian/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: mieru
-Version: 3.8.4
+Version: 3.9.0
 Section: net
 Priority: optional
 Architecture: amd64
diff --git a/build/package/mieru/amd64/rpm/mieru.spec b/build/package/mieru/amd64/rpm/mieru.spec
index f996dc8f..5fc0b62b 100644
--- a/build/package/mieru/amd64/rpm/mieru.spec
+++ b/build/package/mieru/amd64/rpm/mieru.spec
@@ -1,5 +1,5 @@
 Name: mieru
-Version: 3.8.4
+Version: 3.9.0
 Release: 1%{?dist}
 Summary: Mieru proxy client
 License: GPLv3+
diff --git a/build/package/mieru/arm64/debian/DEBIAN/control b/build/package/mieru/arm64/debian/DEBIAN/control
index 85748cc2..04cb43e6 100755
--- a/build/package/mieru/arm64/debian/DEBIAN/control
+++ b/build/package/mieru/arm64/debian/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: mieru
-Version: 3.8.4
+Version: 3.9.0
 Section: net
 Priority: optional
 Architecture: arm64
diff --git a/build/package/mieru/arm64/rpm/mieru.spec b/build/package/mieru/arm64/rpm/mieru.spec
index f996dc8f..5fc0b62b 100644
--- a/build/package/mieru/arm64/rpm/mieru.spec
+++ b/build/package/mieru/arm64/rpm/mieru.spec
@@ -1,5 +1,5 @@
 Name: mieru
-Version: 3.8.4
+Version: 3.9.0
 Release: 1%{?dist}
 Summary: Mieru proxy client
 License: GPLv3+
diff --git a/build/package/mita/amd64/debian/DEBIAN/control b/build/package/mita/amd64/debian/DEBIAN/control
index 457be796..c42364fb 100755
--- a/build/package/mita/amd64/debian/DEBIAN/control
+++ b/build/package/mita/amd64/debian/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: mita
-Version: 3.8.4
+Version: 3.9.0
 Section: net
 Priority: optional
 Architecture: amd64
diff --git a/build/package/mita/amd64/rpm/mita.spec b/build/package/mita/amd64/rpm/mita.spec
index cd78da6a..3f43a42e 100644
--- a/build/package/mita/amd64/rpm/mita.spec
+++ b/build/package/mita/amd64/rpm/mita.spec
@@ -1,5 +1,5 @@
 Name: mita
-Version: 3.8.4
+Version: 3.9.0
 Release: 1%{?dist}
 Summary: Mieru proxy server
 License: GPLv3+
diff --git a/build/package/mita/arm64/debian/DEBIAN/control b/build/package/mita/arm64/debian/DEBIAN/control
index 62573062..3154e360 100755
--- a/build/package/mita/arm64/debian/DEBIAN/control
+++ b/build/package/mita/arm64/debian/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: mita
-Version: 3.8.4
+Version: 3.9.0
 Section: net
 Priority: optional
 Architecture: arm64
diff --git a/build/package/mita/arm64/rpm/mita.spec b/build/package/mita/arm64/rpm/mita.spec
index 9678a70f..9976f051 100644
--- a/build/package/mita/arm64/rpm/mita.spec
+++ b/build/package/mita/arm64/rpm/mita.spec
@@ -1,5 +1,5 @@
 Name: mita
-Version: 3.8.4
+Version: 3.9.0
 Release: 1%{?dist}
 Summary: Mieru proxy server
 License: GPLv3+
diff --git a/docs/server-install.md b/docs/server-install.md
index 1b401e0b..56f8a3f0 100644
--- a/docs/server-install.md
+++ b/docs/server-install.md
@@ -8,32 +8,32 @@ Before installation and configuration, connect to the server via SSH and then ex
 
 ```sh
 # Debian / Ubuntu - X86_64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita_3.8.4_amd64.deb
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita_3.9.0_amd64.deb
 
 # Debian / Ubuntu - ARM 64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita_3.8.4_arm64.deb
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita_3.9.0_arm64.deb
 
 # RedHat / CentOS / Rocky Linux - X86_64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita-3.8.4-1.x86_64.rpm
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita-3.9.0-1.x86_64.rpm
 
 # RedHat / CentOS / Rocky Linux - ARM 64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita-3.8.4-1.aarch64.rpm
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita-3.9.0-1.aarch64.rpm
 ```
 
 ## Install mita package
 
 ```sh
 # Debian / Ubuntu - X86_64
-sudo dpkg -i mita_3.8.4_amd64.deb
+sudo dpkg -i mita_3.9.0_amd64.deb
 
 # Debian / Ubuntu - ARM 64
-sudo dpkg -i mita_3.8.4_arm64.deb
+sudo dpkg -i mita_3.9.0_arm64.deb
 
 # RedHat / CentOS / Rocky Linux - X86_64
-sudo rpm -Uvh --force mita-3.8.4-1.x86_64.rpm
+sudo rpm -Uvh --force mita-3.9.0-1.x86_64.rpm
 
 # RedHat / CentOS / Rocky Linux - ARM 64
-sudo rpm -Uvh --force mita-3.8.4-1.aarch64.rpm
+sudo rpm -Uvh --force mita-3.9.0-1.aarch64.rpm
 ```
 
 Those instructions can also be used to upgrade the version of mita software package.
diff --git a/docs/server-install.zh_CN.md b/docs/server-install.zh_CN.md
index f84f71f6..5ee90c24 100644
--- a/docs/server-install.zh_CN.md
+++ b/docs/server-install.zh_CN.md
@@ -8,32 +8,32 @@
 
 ```sh
 # Debian / Ubuntu - X86_64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita_3.8.4_amd64.deb
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita_3.9.0_amd64.deb
 
 # Debian / Ubuntu - ARM 64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita_3.8.4_arm64.deb
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita_3.9.0_arm64.deb
 
 # RedHat / CentOS / Rocky Linux - X86_64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita-3.8.4-1.x86_64.rpm
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita-3.9.0-1.x86_64.rpm
 
 # RedHat / CentOS / Rocky Linux - ARM 64
-curl -LSO https://github.com/enfein/mieru/releases/download/v3.8.4/mita-3.8.4-1.aarch64.rpm
+curl -LSO https://github.com/enfein/mieru/releases/download/v3.9.0/mita-3.9.0-1.aarch64.rpm
 ```
 
 ## 安装 mita 软件包
 
 ```sh
 # Debian / Ubuntu - X86_64
-sudo dpkg -i mita_3.8.4_amd64.deb
+sudo dpkg -i mita_3.9.0_amd64.deb
 
 # Debian / Ubuntu - ARM 64
-sudo dpkg -i mita_3.8.4_arm64.deb
+sudo dpkg -i mita_3.9.0_arm64.deb
 
 # RedHat / CentOS / Rocky Linux - X86_64
-sudo rpm -Uvh --force mita-3.8.4-1.x86_64.rpm
+sudo rpm -Uvh --force mita-3.9.0-1.x86_64.rpm
 
 # RedHat / CentOS / Rocky Linux - ARM 64
-sudo rpm -Uvh --force mita-3.8.4-1.aarch64.rpm
+sudo rpm -Uvh --force mita-3.9.0-1.aarch64.rpm
 ```
 
 上述指令也可以用来升级 mita 软件包的版本。
diff --git a/pkg/version/current.go b/pkg/version/current.go
index 9b02f564..600bfeb0 100644
--- a/pkg/version/current.go
+++ b/pkg/version/current.go
@@ -16,5 +16,5 @@
 package version
 
 const (
-	AppVersion = "3.8.4"
+	AppVersion = "3.9.0"
 )
diff --git a/test/deploy/packetdrop/client_tcp.json b/test/deploy/packetdrop/client_tcp.json
index 0a171405..85b446b5 100644
--- a/test/deploy/packetdrop/client_tcp.json
+++ b/test/deploy/packetdrop/client_tcp.json
@@ -22,6 +22,6 @@
     "activeProfile": "default",
     "rpcPort": 8989,
     "socks5Port": 1080,
-    "loggingLevel": "INFO",
+    "loggingLevel": "DEBUG",
     "socks5ListenLAN": true
 }
diff --git a/test/deploy/packetdrop/client_udp.json b/test/deploy/packetdrop/client_udp.json
index 01e438ff..0230dedb 100644
--- a/test/deploy/packetdrop/client_udp.json
+++ b/test/deploy/packetdrop/client_udp.json
@@ -23,6 +23,6 @@
     "activeProfile": "default",
     "rpcPort": 8989,
     "socks5Port": 1080,
-    "loggingLevel": "INFO",
+    "loggingLevel": "DEBUG",
     "socks5ListenLAN": true
 }
diff --git a/test/deploy/packetdrop/server_tcp.json b/test/deploy/packetdrop/server_tcp.json
index 56201357..8da05ffa 100644
--- a/test/deploy/packetdrop/server_tcp.json
+++ b/test/deploy/packetdrop/server_tcp.json
@@ -14,5 +14,5 @@
     "advancedSettings": {
         "allowLocalDestination": true
     },
-    "loggingLevel": "INFO"
+    "loggingLevel": "DEBUG"
 }
diff --git a/test/deploy/packetdrop/server_udp.json b/test/deploy/packetdrop/server_udp.json
index 5f996d4e..5341f76c 100644
--- a/test/deploy/packetdrop/server_udp.json
+++ b/test/deploy/packetdrop/server_udp.json
@@ -14,6 +14,6 @@
     "advancedSettings": {
         "allowLocalDestination": true
     },
-    "loggingLevel": "INFO",
+    "loggingLevel": "DEBUG",
     "mtu": 1400
 }