diff --git a/build.sbt b/build.sbt
index 8e4fade0..be51d781 100644
--- a/build.sbt
+++ b/build.sbt
@@ -5,7 +5,7 @@ Global / concurrentRestrictions := Seq(
   Tags.limit(Tags.Test, 1)
 )
 
-val AIRFRAME_VERSION = "20.12.2"
+val AIRFRAME_VERSION = "21.6.0"
 
 // Use dynamic snapshot version strings for non tagged versions
 ThisBuild / dynverSonatypeSnapshots := true
@@ -17,7 +17,7 @@ val buildSettings = Seq[Setting[_]](
   organizationName := "MessagePack",
   organizationHomepage := Some(new URL("http://msgpack.org/")),
   description := "MessagePack for Java",
-  scalaVersion := "2.12.14",
+  scalaVersion := "2.13.6",
   Test / logBuffered := false,
   // msgpack-java should be a pure-java library, so remove Scala specific configurations
   autoScalaLibrary := false,
diff --git a/msgpack-core/src/test/scala/org/msgpack/core/MessagePackTest.scala b/msgpack-core/src/test/scala/org/msgpack/core/MessagePackTest.scala
index f60702ed..2e96ca25 100644
--- a/msgpack-core/src/test/scala/org/msgpack/core/MessagePackTest.scala
+++ b/msgpack-core/src/test/scala/org/msgpack/core/MessagePackTest.scala
@@ -377,8 +377,7 @@ class MessagePackTest extends AirSpec with PropertyCheck with Benchmark {
   }
 
   test("report errors when packing/unpacking malformed strings") {
-    // TODO produce malformed utf-8 strings in Java8"
-    pending
+    pending("We need to produce malformed utf-8 strings in Java 8")
     // Create 100 malformed UTF8 Strings
     val r = new Random(0)
     val malformedStrings = Iterator