diff --git a/polysemy-webserver.cabal b/polysemy-webserver.cabal
--- a/polysemy-webserver.cabal
+++ b/polysemy-webserver.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 11ce70eb79ea2d2a2acae6692a83cd824f82db83b79a87577293b48403faa901
+-- hash: 5f49dee71f21455f19873b8d9433e685e41dd889861f15eeb669693069834660
 
 name:           polysemy-webserver
-version:        0.2.1.0
+version:        0.2.1.1
 synopsis:       Start web servers from within a Polysemy effect stack
 description:    Please see the README on GitLab at <https://gitlab.com/A1kmm/polysemy-webserver/-/blob/master/README.md>
 category:       Web
@@ -37,7 +37,7 @@
       base >=4.7 && <5
     , bytestring
     , http-types
-    , polysemy
+    , polysemy >=1.4.0.0
     , polysemy-plugin
     , wai
     , wai-websockets