diff --git a/build.sbt b/build.sbt
index 8eb2b624..a08facca 100644
--- a/build.sbt
+++ b/build.sbt
@@ -161,7 +161,7 @@ lazy val msgpackCore = Project(id = "msgpack-core", base = file("msgpack-core"))
         "org.wvlet.airframe" %% "airframe-json" % AIRFRAME_VERSION % "test",
         "org.wvlet.airframe" %% "airspec"       % AIRFRAME_VERSION % "test",
         // Add property testing support with forAll methods
-        "org.scalacheck" %% "scalacheck" % "1.19.0" % "test",
+        "org.scalacheck" %% "scalacheck" % "1.20.0" % "test",
         // For performance comparison with msgpack v6
         "org.msgpack" % "msgpack" % "0.6.12" % "test",
         // For integration test with Akka