diff --git a/build.sbt b/build.sbt
index 58602a3383..35e788b832 100644
--- a/build.sbt
+++ b/build.sbt
@@ -321,7 +321,7 @@ lazy val io = crossProject(JVMPlatform, JSPlatform, NativePlatform)
   .settings(
     name := "fs2-io",
     tlVersionIntroduced ~= { _.updated("3", "3.1.0") },
-    libraryDependencies += "com.comcast" %%% "ip4s-core" % "3.3.0",
+    libraryDependencies += "com.comcast" %%% "ip4s-core" % "3.4.0",
     tlJdkRelease := None
   )
   .jvmSettings(