diff --git a/numerus-closus.cabal b/numerus-closus.cabal
--- a/numerus-closus.cabal
+++ b/numerus-closus.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.0
 name:                numerus-closus
-version:             0.2.0.0
+version:             0.3.0.0
 author:              Gautier DI FOLCO
 maintainer:          gautier.difolco@gmail.com
 category:            Scheduling
diff --git a/src/Control/NumerusClosus.hs b/src/Control/NumerusClosus.hs
--- a/src/Control/NumerusClosus.hs
+++ b/src/Control/NumerusClosus.hs
@@ -110,9 +110,7 @@
 
 -- | A sliding window rate limiter that allows a given number of requests within the sliding window.
 slidingWindow :: Typed.WindowSize -> Typed.BucketSize Int -> RateLimiter
-slidingWindow ws bs = RateLimiter $ Typed.slidingWindow ws bs epoch
-  where
-    epoch = UTCTime (toEnum 0) 0
+slidingWindow ws bs = RateLimiter $ Typed.slidingWindow ws bs
 
 -- | Sliding window counter using two-window weighted interpolation.
 slidingWindowCount :: Typed.WindowSize -> Typed.BucketSize Integer -> UTCTime -> RateLimiter
diff --git a/src/Control/NumerusClosus/Typed.hs b/src/Control/NumerusClosus/Typed.hs
--- a/src/Control/NumerusClosus/Typed.hs
+++ b/src/Control/NumerusClosus/Typed.hs
@@ -178,7 +178,6 @@
   { windowSize :: WindowSize,
     maxBucket :: BucketSize Int,
     -- \* Iteration field
-    windowStart :: UTCTime,
     bucket :: Set.Set UTCTime
   }
   deriving stock (Eq, Show, Generic)
@@ -191,8 +190,8 @@
     where
       refreshedBucket = snd $ Set.split (addUTCTime ((-1) * windowSize.unWindowSize) now) bucket
 
-slidingWindow :: WindowSize -> BucketSize Int -> UTCTime -> SlidingWindow
-slidingWindow windowSize maxBucket windowStart =
+slidingWindow :: WindowSize -> BucketSize Int -> SlidingWindow
+slidingWindow windowSize maxBucket =
   SlidingWindow {bucket = Set.empty, ..}
 
 -- | The number of sub-windows for bucketed sliding windows.