diff --git a/build.sbt b/build.sbt
index 554b1e2..e41ec5f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -30,7 +30,7 @@ libraryDependencies ++= Seq(
   "software.amazon.ion" % "ion-java" % "1.5.1",
 
   "org.sangria-graphql" %% "sangria-marshalling-testkit" % "1.0.3" % Test,
-  "org.scalatest" %% "scalatest" % "3.1.4" % Test
+  "org.scalatest" %% "scalatest" % "3.2.3" % Test
 )
 
 git.remoteRepo := "git@github.com:sangria-graphql/sangria-ion.git"