diff --git a/project/Versions.scala b/project/Versions.scala
index 44fffb2603..061d15889b 100644
--- a/project/Versions.scala
+++ b/project/Versions.scala
@@ -52,7 +52,7 @@ object Versions {
   val armeria = "1.26.4"
   val scalaJava8Compat = "1.0.2"
   val scalaCollectionCompat = "2.11.0"
-  val fs2 = "3.9.3"
+  val fs2 = "3.9.4"
   val decline = "2.4.1"
   val quicklens = "1.9.6"
   val openTelemetry = "1.34.1"