diff --git a/lm-coursier/src/main/scala/lmcoursier/internal/SbtUpdateReport.scala b/lm-coursier/src/main/scala/lmcoursier/internal/SbtUpdateReport.scala
index d97492911..649e24da0 100644
--- a/lm-coursier/src/main/scala/lmcoursier/internal/SbtUpdateReport.scala
+++ b/lm-coursier/src/main/scala/lmcoursier/internal/SbtUpdateReport.scala
@@ -1,7 +1,6 @@
 package lmcoursier.internal
 
 import java.io.File
-import java.lang.ref.WeakReference
 import java.util.{ Collections, GregorianCalendar, WeakHashMap }
 import coursier.cache.CacheUrl
 import coursier.{ Attributes, Dependency, Module, Project, Resolution }
@@ -18,16 +17,16 @@ private[internal] object SbtUpdateReport {
 
   private def caching[K, V](f: K => V): K => V = {
 
-    val cache = Collections.synchronizedMap(new WeakHashMap[K, WeakReference[V]])
+    val cache = Collections.synchronizedMap(new WeakHashMap[K, V])
 
     key =>
       val previousValueOpt = Option(cache.get(key))
 
-      previousValueOpt.fold {
+      previousValueOpt.getOrElse {
         val value = f(key)
-        val concurrentValueOpt = Option(cache.putIfAbsent(key, new WeakReference(value)))
-        concurrentValueOpt.fold(value)(_.get())
-      }(_.get())
+        val concurrentValueOpt = Option(cache.putIfAbsent(key, value))
+        concurrentValueOpt.getOrElse(value)
+      }
   }
 
   private def infoProperties(project: Project): Seq[(String, String)] =