diff --git a/build.sbt b/build.sbt
index 67343e0..b4cb53d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -20,7 +20,8 @@ ThisBuild / githubWorkflowBuildPreamble ++= nativeBrewInstallWorkflowSteps.value
 
 val catsV = "2.10.0"
 val catsEffectV = "3.5.3"
-val fs2V = "3.9.3"
+val fs2V = "3.9.4"
+
 
 val munitCatsEffectV = "2.0.0-M4"