diff --git a/build.sbt b/build.sbt
index 39988f36..a18cb07a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -108,7 +108,7 @@ val scalaTest       = Def.setting("org.scalatest" %%% "scalatest" % "3.2.15")
 val scalaCheck      = Def.setting("org.scalacheck" %%% "scalacheck" % "1.17.0")
 val slick           = "com.typesafe.slick" %% "slick" % "3.4.1"
 val optionalSlick   = optional(slick)
-val playJson        = "com.typesafe.play" %% "play-json" % "2.9.3"
+val playJson        = "com.typesafe.play" %% "play-json" % "2.9.4"
 val slickPg         = "com.github.tminglei" %% "slick-pg" % "0.21.1"
 val doobie          = "org.tpolecat" %% "doobie-core" % "1.0.0-RC2"
 val doobiePg        = "org.tpolecat" %% "doobie-postgres" % "1.0.0-RC2"