diff --git a/build.sbt b/build.sbt
index 5077098c..c45aa819 100644
--- a/build.sbt
+++ b/build.sbt
@@ -52,7 +52,7 @@ ThisBuild / crossScalaVersions := Seq(Scala212, Scala3, Scala213)
 
 val catsEffectVersion = "3.5.3"
 val circeVersion = "0.14.6"
-val fs2Version = "3.9.3"
+val fs2Version = "3.9.4"
 val http4sVersion = "0.23.25"
 val natchezVersion = "0.3.5"
 val munitVersion = "0.7.29"