diff --git a/build.sbt b/build.sbt
index ad434496..8a6e1c10 100644
--- a/build.sbt
+++ b/build.sbt
@@ -277,7 +277,7 @@ lazy val sangriaTestFS2 = project
   .settings(
     name := "sangria-test-fs2",
     description := "Tests with FS2",
-    libraryDependencies += "co.fs2" %% "fs2-core" % "3.9.3" % Test
+    libraryDependencies += "co.fs2" %% "fs2-core" % "3.9.4" % Test
   )
   .disablePlugins(MimaPlugin)