diff --git a/pinboard.cabal b/pinboard.cabal
--- a/pinboard.cabal
+++ b/pinboard.cabal
@@ -1,5 +1,5 @@
 name:                pinboard
-version:             0.8.6
+version:             0.8.7
 synopsis:            Access to the Pinboard API
 license:             MIT
 license-file:        LICENSE
@@ -42,13 +42,13 @@
                      , http-types
                      , http-client
                      , http-client-tls
-                     , mtl >= 2.1.3.1
+                     , mtl >= 2.2.1
                      , old-locale
                      , network
                      , random >= 1.1
                      , text
                      , time
-                     , transformers
+                     , transformers >= 0.4.0.0
                      , unordered-containers
                      , vector
               
diff --git a/src/Pinboard/Client.hs b/src/Pinboard/Client.hs
--- a/src/Pinboard/Client.hs
+++ b/src/Pinboard/Client.hs
@@ -155,7 +155,7 @@
 buildReq url = do
   req <- liftIO $ parseUrl $ "https://api.pinboard.in/v1/" <> url
   return $ req 
-    { requestHeaders = [("User-Agent","pinboard.hs/0.8.6")]
+    { requestHeaders = [("User-Agent","pinboard.hs/0.8.7")]
     , checkStatus = \_ _ _ -> Nothing
     }