diff --git a/CHANGES.txt b/CHANGES.txt
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,7 @@
 Changelog for Hoogle
 
+4.2.41
+    #115, require warp-2.1 or above
 4.2.40
     #107, fix the keywords URL moving
 4.2.39
diff --git a/hoogle.cabal b/hoogle.cabal
--- a/hoogle.cabal
+++ b/hoogle.cabal
@@ -1,7 +1,7 @@
 cabal-version:      >= 1.10
 build-type:         Simple
 name:               hoogle
-version:            4.2.40
+version:            4.2.41
 license:            BSD3
 license-file:       docs/LICENSE
 category:           Development
@@ -149,7 +149,7 @@
         resourcet,
         parsec >= 2.1,
         wai >= 1.1,
-        warp >= 1.1,
+        warp >= 2.1,
         Cabal >= 1.8,
         shake >= 0.14,
         QuickCheck,