diff --git a/Text/RSS.hs b/Text/RSS.hs
--- a/Text/RSS.hs
+++ b/Text/RSS.hs
@@ -58,7 +58,11 @@
 
 import Network.URI (URI)
 
+#if MIN_VERSION_time(1,5,0)
+import Data.Time.Format(defaultTimeLocale, rfc822DateFormat)
+#else
 import System.Locale (defaultTimeLocale, rfc822DateFormat)
+#endif
 
 import Data.Time.Clock  (UTCTime)
 import Data.Time.Format (formatTime)
diff --git a/rss.cabal b/rss.cabal
--- a/rss.cabal
+++ b/rss.cabal
@@ -1,5 +1,5 @@
 Name: rss
-Version: 3000.2.0.3
+Version: 3000.2.0.4
 Cabal-version: >=1.6
 Build-type: Simple
 Copyright: Jeremy Shaw 2004, Bjorn Bringert 2004-2006
@@ -18,11 +18,34 @@
   Type:     git
   Location: git://github.com/basvandijk/rss.git
 
+flag old-locale
+  description: If false then depend on time >= 1.5.
+               .
+               If true then depend on time < 1.5 together with old-locale.
+  default: False
+
+flag network-uri
+   description: Get Network.URI from the network-uri package
+   default: True
+
 Library
   build-depends: base       >= 3      && < 5
-               , network    >= 2.0    && < 2.6
                , HaXml      >= 1.24
                , time       >= 1.1.2  && < 1.5
                , old-locale >= 1.0    && < 1.1
+
+  if flag(old-locale)
+    build-depends: time       >= 1.1.2 && < 1.5
+                 , old-locale >= 1.0   && < 1.1
+  else
+    build-depends: time >= 1.5 && < 1.6
+
+  if flag(network-uri)
+    build-depends: network-uri >= 2.6 && < 2.7
+                 , network     >= 2.6 && < 2.7
+  else
+    build-depends: network-uri >= 2.5 && < 2.6
+                 , network     >= 2.0 && < 2.6
+
   Exposed-Modules: Text.RSS
   ghc-options: -Wall