diff --git a/build.sbt b/build.sbt
index 8c19408..03d36c2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -18,7 +18,7 @@ ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.temurin("21"))
 
 val CatsVersion = "2.10.0"
 val CatsEffectVersion = "3.5.2"
-val Fs2Version = "3.9.3"
+val Fs2Version = "3.9.4"
 val Fs2DomVersion = "0.2.1"
 val Http4sVersion = "0.23.25"
 val Http4sDomVersion = "0.2.11"