diff --git a/lm-core/src/main/scala/sbt/librarymanagement/UpdateReportExtra.scala b/lm-core/src/main/scala/sbt/librarymanagement/UpdateReportExtra.scala
index 900c9af0e..4cbd69cdb 100644
--- a/lm-core/src/main/scala/sbt/librarymanagement/UpdateReportExtra.scala
+++ b/lm-core/src/main/scala/sbt/librarymanagement/UpdateReportExtra.scala
@@ -112,7 +112,7 @@ private[librarymanagement] abstract class ModuleReportExtra {
 
   private def calendarToString(c: ju.Calendar): String = {
     import sjsonnew.*, BasicJsonProtocol.*
-    implicitly[IsoString[ju.Calendar]] to c
+    implicitly[IsoString[ju.Calendar]].to(c)
   }
 
   def retrieve(f: (ModuleID, Artifact, File) => File): ModuleReport =
diff --git a/lm-ivy/src/test/scala/sbt/internal/librarymanagement/DMSerializationSpec.scala b/lm-ivy/src/test/scala/sbt/internal/librarymanagement/DMSerializationSpec.scala
index b207cf1ec..b6e221fe7 100644
--- a/lm-ivy/src/test/scala/sbt/internal/librarymanagement/DMSerializationSpec.scala
+++ b/lm-ivy/src/test/scala/sbt/internal/librarymanagement/DMSerializationSpec.scala
@@ -99,9 +99,9 @@ object DMSerializationSpec extends BasicTestSuite {
     }
 
   def roundtripBuilder[A: JsonReader: JsonWriter](a: A)(f: (A, A) => Unit): Unit = {
-    val json = isoString to (Converter toJsonUnsafe a)
+    val json = isoString.to(Converter.toJsonUnsafe(a))
     println(json)
-    val obj = Converter.fromJsonUnsafe[A](isoString from json)
+    val obj = Converter.fromJsonUnsafe[A](isoString.from(json))
     f(a, obj)
   }
 
diff --git a/main/src/main/scala/sbt/internal/server/SettingQuery.scala b/main/src/main/scala/sbt/internal/server/SettingQuery.scala
index 37075bcfe..dea9054e8 100644
--- a/main/src/main/scala/sbt/internal/server/SettingQuery.scala
+++ b/main/src/main/scala/sbt/internal/server/SettingQuery.scala
@@ -111,7 +111,7 @@ object SettingQuery {
       case NoJsonWriter()     => Left(s"JsonWriter for ${key.tag} not found")
     }
 
-  def toJson[A: JsonWriter](x: A): JValue = Converter toJsonUnsafe x
+  def toJson[A: JsonWriter](x: A): JValue = Converter.toJsonUnsafe(x)
 
   def getSettingJsonValue[A](
       structure: BuildStructure,
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 2fcaa7ff0..b2ec98c5a 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -67,7 +67,7 @@ object Dependencies {
   def addSbtZinc = addSbtModule(sbtZincPath, "zinc", zinc)
   def addSbtZincCompileCore = addSbtModule(sbtZincPath, "zincCompileCore", zincCompileCore)
 
-  lazy val sjsonNewVersion = "0.14.0-M2"
+  lazy val sjsonNewVersion = "0.14.0-M4"
   def sjsonNew(n: String) = Def.setting(
     "com.eed3si9n" %% n % sjsonNewVersion
   ) // contrabandSjsonNewVersion.value
diff --git a/util-cache/src/main/scala/sbt/util/FileInfo.scala b/util-cache/src/main/scala/sbt/util/FileInfo.scala
index 897c70b34..603064e2c 100644
--- a/util-cache/src/main/scala/sbt/util/FileInfo.scala
+++ b/util-cache/src/main/scala/sbt/util/FileInfo.scala
@@ -12,7 +12,8 @@ import java.io.File
 
 import scala.util.control.NonFatal
 import sbt.io.{ Hash, IO }
-import sjsonnew.{ arrayFormat as _, * }
+import sjsonnew.*
+import sjsonnew.BasicJsonProtocol.given
 import sbt.nio.file.*
 import sbt.nio.file.syntax.*