diff --git a/build.sbt b/build.sbt
index a8504ec..407c3d3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -15,7 +15,7 @@
 organization := Organization
 name := Name
 version := GitBucketVersion
-scalaVersion := "2.13.12"
+scalaVersion := "2.13.13"
 
 crossScalaVersions += "3.4.0"
 
diff --git a/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala b/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
index 3e8df69..386b78d 100644
--- a/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
+++ b/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
@@ -42,6 +42,7 @@
 import org.eclipse.jgit.diff.DiffEntry.ChangeType
 import org.eclipse.jgit.internal.storage.file.FileRepository
 import org.json4s.Formats
+import org.json4s.convertToJsonInput
 import org.json4s.jackson.Serialization._
 
 /**
diff --git a/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala b/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
index ef3112e..a8f2c53 100644
--- a/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
+++ b/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
@@ -2,6 +2,7 @@
 
 import org.json4s.Formats
 import org.json4s.jackson.JsonMethods
+import org.json4s.jvalue2extractable
 import org.scalatest.funsuite.AnyFunSuite
 
 class JsonFormatSpec extends AnyFunSuite {
diff --git a/src/test/scala/gitbucket/core/service/MergeServiceSpec.scala b/src/test/scala/gitbucket/core/service/MergeServiceSpec.scala
index 10cd09d..220e7f5 100644
--- a/src/test/scala/gitbucket/core/service/MergeServiceSpec.scala
+++ b/src/test/scala/gitbucket/core/service/MergeServiceSpec.scala
@@ -24,6 +24,7 @@
 import org.eclipse.jetty.webapp.WebAppContext
 import org.eclipse.jetty.server.{Request, Server}
 import org.json4s.jackson.JsonMethods._
+import org.json4s.jvalue2monadic
 import MergeServiceSpec._
 import org.json4s.JsonAST.{JArray, JString}