diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for eventuo11y
 
+## 0.1.0.1 -- 2022-09-30
+
+Relax aeson lower bound
+
 ## 0.1.0.0 -- 2022-09-28
 
 Initial release
diff --git a/Example.hs b/Example.hs
--- a/Example.hs
+++ b/Example.hs
@@ -3,6 +3,8 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE TypeSynonymInstances #-}
 
 module Main where
 
@@ -29,7 +31,8 @@
 
 -- We take an EventBackend, polymorphic in r, supporting our domain-specific selector type
 writeToFile :: EventBackend IO r FileSelector -> FilePath -> ByteString -> IO ()
-writeToFile backend path (BS fptr sz) = do
+writeToFile backend path bs = do
+  let (fptr, base_off, sz) = toForeignPtr bs
   -- We start an event, selected by OpenFile
   fd <- withEvent backend OpenFile $ \ev -> do
     -- We add a Filename field to our current active event
@@ -50,7 +53,7 @@
           newOffset <- withEvent backend WriteFile $ \ev -> do
             let ct = bcSz - offset
             addField ev $ BytesAsked ct
-            written <- fdWriteBuf fd (plusPtr ptr (fromIntegral offset)) ct
+            written <- fdWriteBuf fd (plusPtr ptr (base_off + fromIntegral offset)) ct
             addField ev $ BytesActual written
             pure $ offset + written
           when (newOffset < bcSz) $
diff --git a/eventuo11y.cabal b/eventuo11y.cabal
--- a/eventuo11y.cabal
+++ b/eventuo11y.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               eventuo11y
-version:            0.1.0.0
+version:            0.1.0.1
 synopsis:           An event-oriented observability library
 description:
   Instrument your Haskell codebase with wide, semantically meaningful events.
@@ -26,7 +26,7 @@
   See "Observe.Event.Implementation" for documentation on writing an
   @EventBackend@.
 
-  See [Example.hs](https://github.com/shlevy/eventuo11y/tree/v0.1.0.0/Example.hs) for an example.
+  See [Example.hs](https://github.com/shlevy/eventuo11y/tree/v0.1.0.1/Example.hs) for an example.
 
   See [eventuo11y-batteries](https://hackage.haskell.org/package/eventuo11y-batteries) for miscellaneous
   framework-specific helpers.
@@ -57,7 +57,7 @@
     Observe.Event.Render.JSON
 
   build-depends:
-    , aeson          ^>=2.0.3.0
+    , aeson          ^>=2.0.2.0
     , base           >=4.14      && <4.17
     , bytestring     >=0.10.12.0 && <0.12
     , exceptions     ^>=0.10.4