diff --git a/build.sbt b/build.sbt
index efa49a0a..21d6f3ff 100644
--- a/build.sbt
+++ b/build.sbt
@@ -150,6 +150,6 @@ lazy val fs2 = project
   .settings(
     name := "colibri-fs2",
     libraryDependencies ++= Seq(
-      "co.fs2" %%% "fs2-core" % "3.8.0",
+      "co.fs2" %%% "fs2-core" % "3.9.1",
     ),
   )