diff --git a/list-t-libcurl.cabal b/list-t-libcurl.cabal
--- a/list-t-libcurl.cabal
+++ b/list-t-libcurl.cabal
@@ -1,7 +1,7 @@
 name:
   list-t-libcurl
 version:
-  0.3.1
+  0.3.2
 synopsis:
   A "libcurl"-based streaming HTTP client
 category:
@@ -53,7 +53,7 @@
     bytestring >= 0.10 && < 0.11,
 
     list-t >= 0.4 && < 2,
-    either == 4.*,
+    either >= 4 && < 6,
     
     mtl-prelude >= 1 && < 3,
     base-prelude >= 0.1.19 && < 2,