diff --git a/build.gradle.kts b/build.gradle.kts
index 8909ff8..213b7e9 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -49,28 +49,9 @@ dependencies {
     implementation("io.github.smiley4:schema-kenerator-reflection:$schema_kenerator_version")
     implementation("com.sun.mail:javax.mail:1.6.2") // 邮件发送
 
-    //mysql
-    val mysql_version: String by project
-    implementation("mysql:mysql-connector-java:$mysql_version")
     //postgresql
-    val pg_version: String by project
-    implementation("com.impossibl.pgjdbc-ng:pgjdbc-ng:$pg_version")
-    implementation("org.postgresql:postgresql:42.7.3")
-    //h2
-    val h2_version: String by project
-    implementation("com.h2database:h2:$h2_version")
-    //MariaDB
-    val mariadb_version: String by project
-    implementation("org.mariadb.jdbc:mariadb-java-client:$mariadb_version")
-    //Oracle
-    val oracle_version: String by project
-    implementation("com.oracle.database.jdbc:ojdbc8:$oracle_version")
-    //MicrosoftSQLServer
-    val mssql_version: String by project
-    implementation("com.microsoft.sqlserver:mssql-jdbc:$mssql_version")
-    //SQLite
-    val sqlite_version: String by project
-    implementation("org.xerial:sqlite-jdbc:$sqlite_version")
+    val postgresql_version: String by project
+    implementation("org.postgresql:postgresql:$postgresql_version")
 
     //数据库
     implementation("org.jetbrains.exposed:exposed-core:$exposed_version") // 数据库
diff --git a/gradle.properties b/gradle.properties
index d21b1bc..f8bca66 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,10 +9,4 @@ jline_version=3.26.2
 swagger_ui_version=3.2.0
 schema_kenerator_version=1.1.0
 # database
-h2_version=2.2.224
-mysql_version=8.0.33
-pg_version=0.8.9
-mariadb_version=3.4.0
-oracle_version=23.4.0.24.05
-mssql_version=12.6.3.jre11
-sqlite_version=3.46.0.0
\ No newline at end of file
+postgresql_version=42.7.3
\ No newline at end of file
diff --git a/src/main/kotlin/subit/ForumBackend.kt b/src/main/kotlin/subit/ForumBackend.kt
index 8b9c39a..1c5783c 100644
--- a/src/main/kotlin/subit/ForumBackend.kt
+++ b/src/main/kotlin/subit/ForumBackend.kt
@@ -47,7 +47,7 @@ private fun parseCommandLineArgs(args: Array<String>): Pair<Array<String>, File>
     // 去除命令行中的-config参数, 因为ktor会解析此参数进而不加载打包的application.yaml
     // 其余参数还原为字符串数组
     val resArgs = argsMap.entries
-        .filterNot { it.key == "-config" || it.key == "-workDir" || it.key == "-debug" || it.key == "-youthwrite" }
+        .filterNot { it.key == "-config" || it.key == "-workDir" || it.key == "-debug" }
         .map { (k, v) -> "$k=$v" }
         .toTypedArray()
     // 命令行中输入的自定义配置文件
@@ -70,9 +70,11 @@ fun main(args: Array<String>)
     if (!configFile.exists())
     {
         configFile.createNewFile()
-        val defaultConfig =
-            Loader.getResource("default_config.yaml")?.readAllBytes() ?: error("default_config.yaml not found")
-        configFile.writeBytes(defaultConfig)
+        Loader
+            .getResource("default_config.yaml")
+            ?.readAllBytes()
+            ?.let(configFile::writeBytes)
+            ?: error("default_config.yaml not found")
         ForumLogger.getLogger().severe(
             "config.yaml not found, the default config has been created, " +
             "please modify it and restart the program"
@@ -93,10 +95,6 @@ fun main(args: Array<String>)
 
     // 生成环境
     val environment = commandLineEnvironment(args = resArgs)
-    {
-        ForumLogger.getLogger().info("rootPath: ${this.rootPath}")
-        ForumLogger.getLogger().info("port: ${this.config}")
-    }
     // 启动服务器
     embeddedServer(Netty, environment).start(wait = true)
     // 若服务器关闭则终止整个程序
diff --git a/src/main/kotlin/subit/database/sqlImpl/SqlDatabaseImpl.kt b/src/main/kotlin/subit/database/sqlImpl/SqlDatabaseImpl.kt
index 5d757ba..56d0864 100644
--- a/src/main/kotlin/subit/database/sqlImpl/SqlDatabaseImpl.kt
+++ b/src/main/kotlin/subit/database/sqlImpl/SqlDatabaseImpl.kt
@@ -56,13 +56,7 @@ object SqlDatabaseImpl: IDatabase, KoinComponent
     private lateinit var config: ApplicationConfig
     private val logger = ForumLogger.getLogger()
     private val drivers:List<Driver> = listOf(
-        org.h2.Driver(),
-        com.impossibl.postgres.jdbc.PGDriver(),
-        org.sqlite.JDBC(),
-        com.mysql.cj.jdbc.Driver(),
-        oracle.jdbc.OracleDriver(),
-        com.microsoft.sqlserver.jdbc.SQLServerDriver(),
-        org.mariadb.jdbc.Driver()
+        org.postgresql.Driver(),
     )
 
     /**
diff --git a/src/main/resources/default_config.yaml b/src/main/resources/default_config.yaml
index e99838c..1b8ce3f 100644
--- a/src/main/resources/default_config.yaml
+++ b/src/main/resources/default_config.yaml
@@ -8,13 +8,7 @@ database:
   sql: # 该配置项仅在 impl 为 sql 时必须, 其余情况下无效
 
     # 支持的数据库：
-    # - H2 (versions 2.x）
-    # - MariaDB
-    # - MySQL
-    # - Oracle
     # - Postgres
-    # - MicrosoftSQLServer
-    # - SQLite
 
     #数据库用户名
     user: 'YourSqlUser'
@@ -22,27 +16,12 @@ database:
     password: 'YourSqlPassword'
 
     # 数据库连接地址
-    url: 'jdbc:mysql://YourSqlHost:YourSqlPort/YourDatabaseName' # mysql
-    ## url: 'jdbc:pgsql://YourSqlHost:YourSqlPort/YourDatabaseName' # postgres
-    ## url: 'jdbc:sqlite:YourDatabaseName' # sqlite
-    ## url: 'jdbc:h2:YourDatabaseName' # h2
-    ## url: 'jdbc:oracle:thin:@YourSqlHost:YourSqlPort:YourDatabaseName' # oracle
-    ## url: 'jdbc:sqlserver://YourSqlHost:YourSqlPort;databaseName=YourDatabaseName' # sqlserver
-    ## url: 'jdbc:mariadb://YourSqlHost:YourSqlPort/YourDatabaseName' # mariadb
+    url: 'jdbc:postgresql://YourSqlHost:YourSqlPort/YourDatabaseName' # postgres
 
     # 数据库驱动 该项可以不填或填为null以通过url自动识别对应驱动
     driver: null
-    ## driver: 'com.mysql.cj.jdbc.Driver' # mysql
-    ## driver: 'com.impossibl.postgres.jdbc.PGDriver' # postgres
-    ## driver: 'org.sqlite.JDBC' # sqlite
-    ## driver: 'org.h2.Driver' # h2
-    ## driver: 'oracle.jdbc.OracleDriver' # oracle
-    ## driver: 'com.microsoft.sqlserver.jdbc.SQLServerDriver' # sqlserver
-    ## driver: 'org.mariadb.jdbc.Driver' # mariadb
+    # 目前支持的数据库驱动有:
+    ## driver: 'org.postgresql.Driver' # postgres
 
     # 数据库懒惰初始化
-    lazyInit: true
-
-# jwt登陆验证
-#jwt:
-#  secret: "SUBIT_SECRET" # Your can set your own secret key here, or a random one will be used
\ No newline at end of file
+    lazyInit: true
\ No newline at end of file