diff --git a/build.gradle.kts b/build.gradle.kts
index 38e7045..3345f35 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -22,7 +22,7 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     implementation("com.github.xiaoymin:knife4j-spring-boot-starter:3.0.2")
-    implementation("com.baomidou:mybatis-plus-boot-starter:${ext}")
+    implementation("com.baomidou:mybatis-plus-boot-starter:3.4.2")
     implementation("com.alibaba:druid-spring-boot-starter:1.2.5")
     implementation("org.postgresql:postgresql:42.2.18")
     implementation("org.projectlombok:lombok:1.18.12")