diff --git a/build.sbt b/build.sbt
index f53352d..bcc8d67 100644
--- a/build.sbt
+++ b/build.sbt
@@ -20,7 +20,7 @@ val fs2_2_version: Option[(Long, Long)] => String = {
   case Some((2, 11)) => "2.1.0"
   case _             => "2.5.9"
 }
-val fs2_3_version = "3.9.3"
+val fs2_3_version = "3.9.4"
 val armeriaVersion = "1.26.4"
 
 excludeLintKeys in Global ++= Set(ideSkipProject)