diff --git a/src/Hash2Pub/PostService.hs b/src/Hash2Pub/PostService.hs
index 81cf552..7bf0c3c 100644
--- a/src/Hash2Pub/PostService.hs
+++ b/src/Hash2Pub/PostService.hs
@@ -12,15 +12,14 @@ import           Control.Concurrent
 import           Control.Concurrent.Async
 import           Control.Concurrent.STM
 import           Control.Exception         (Exception (..), try)
-import           Control.Monad             (foldM, forM, forM_, forever, void,
-                                            when)
+import           Control.Monad             (foldM, forM_, forever, void, when)
 import           Control.Monad.IO.Class    (liftIO)
 import           Data.Bifunctor
 import qualified Data.ByteString.Lazy.UTF8 as BSUL
 import qualified Data.ByteString.UTF8      as BSU
 import qualified Data.HashMap.Strict       as HMap
 import qualified Data.HashSet              as HSet
-import           Data.Maybe                (fromMaybe, isJust)
+import           Data.Maybe                (isJust)
 import           Data.String               (fromString)
 import qualified Data.Text.Lazy            as Txt
 import           Data.Text.Normalize       (NormalizationMode (NFC), normalize)
@@ -601,7 +600,7 @@ fetchTagPosts serv = forever $ do
     -- TODO: batching, retry
     -- TODO: process multiple in parallel
     pIdUri <- atomically . readTQueue $ postFetchQueue serv
-    fetchReq <- HTTP.parseRequest . Txt.unpack $pIdUri
+    fetchReq <- HTTP.parseRequest . Txt.unpack $ pIdUri
     resp <- try $ HTTP.httpLbs fetchReq (httpMan serv) :: IO (Either HTTP.HttpException (HTTP.Response BSUL.ByteString))
     case resp of
       Right response ->
diff --git a/src/Hash2Pub/RingMap.hs b/src/Hash2Pub/RingMap.hs
index e99f8b2..ae1ec15 100644
--- a/src/Hash2Pub/RingMap.hs
+++ b/src/Hash2Pub/RingMap.hs
@@ -23,7 +23,7 @@ instance (Bounded k, Ord k, Eq a) => Eq (RingMap k a) where
     a == b = getRingMap a == getRingMap b
 
 instance (Bounded k, Ord k, Show k, Show a) => Show (RingMap k a) where
-    show rmap = shows "RingMap " (show $ getRingMap rmap)
+    show rmap = shows ("RingMap " :: String) (show $ getRingMap rmap)
 
 -- | entry of a 'RingMap' that holds a value and can also
 -- wrap around the lookup direction at the edges of the name space.
@@ -207,7 +207,7 @@ takeEntriesUntil_ :: (Integral i, Bounded k, Ord k)
                  -> Maybe i     -- possible number limit
                  -> [a]
                  -> [a]
-takeEntriesUntil_ rmap' getterFunc' havingReached previousEntry (Just remaining) takeAcc
+takeEntriesUntil_ _rmap' _getterFunc' _havingReached _previousEntry (Just remaining) takeAcc
   -- length limit reached
   | remaining <= 0 = takeAcc
 takeEntriesUntil_ rmap' getterFunc' havingReached previousEntry numLimit takeAcc =