diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3d9997bb..8bcdb7fe 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -31,7 +31,7 @@ jobs:
           - "11"
         scala:
           - "2.11.12"
-          - "2.12.12"
+          - "2.12.14"
   test:
     runs-on: ubuntu-latest
     steps:
@@ -49,7 +49,7 @@ jobs:
           - "8"
           - "11"
         scala:
-          - "2.12.12"
+          - "2.12.14"
           - "2.13.6"
   testWithCoverageReport:
     runs-on: ubuntu-latest
diff --git a/build.sbt b/build.sbt
index b4a69463..0cb705bd 100644
--- a/build.sbt
+++ b/build.sbt
@@ -19,7 +19,7 @@ def scalaVersionSpecificFolders(srcBaseDir: java.io.File, scalaVersion: String):
 val sharedSettings = mimaDefaultSettings ++ Seq(
   organization := "com.twitter",
   scalaVersion := "2.11.12",
-  crossScalaVersions := Seq("2.11.12", "2.12.12"),
+  crossScalaVersions := Seq("2.11.12", "2.12.14"),
   scalacOptions ++= Seq("-unchecked", "-deprecation"),
   scalacOptions ++= {
     scalaVersion.value match {
diff --git a/chill-scala/src/main/scala-2.12-/com/twitter/chill/WrappedArraySerializer.scala b/chill-scala/src/main/scala-2.12-/com/twitter/chill/WrappedArraySerializer.scala
index 77a9081c..54119cce 100644
--- a/chill-scala/src/main/scala-2.12-/com/twitter/chill/WrappedArraySerializer.scala
+++ b/chill-scala/src/main/scala-2.12-/com/twitter/chill/WrappedArraySerializer.scala
@@ -17,7 +17,7 @@ limitations under the License.
 package com.twitter.chill
 
 import scala.collection.mutable
-import scala.collection.mutable.{WrappedArray, WrappedArrayBuilder}
+import scala.collection.mutable.{ArrayBuilder, WrappedArray}
 import scala.reflect._
 
 class WrappedArraySerializer[T] extends KSerializer[WrappedArray[T]] {
@@ -33,7 +33,7 @@ class WrappedArraySerializer[T] extends KSerializer[WrappedArray[T]] {
     // uses the registration system, and this class might not be registered
     val clazz = kser.readObject(in, classOf[Class[T]])
     val array = kser.readClassAndObject(in).asInstanceOf[Array[T]]
-    val bldr = new WrappedArrayBuilder[T](ClassTag[T](clazz))
+    val bldr = ArrayBuilder.make[T]()(ClassTag[T](clazz))
     bldr.sizeHint(array.size)
     bldr ++= array
     bldr.result()