diff --git a/CHANGES b/CHANGES
index ea5bffdac..e7c8cd7b2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,9 @@
 ===== dev =====
 
+===== Build =====
+
+  * Remove unused dependency in dune file. (#969, Kate Deplaix)
+
 ===== 5.6.1 =====
 
 ====== Fixes ======
diff --git a/src/core/dune b/src/core/dune
index 0564fee0c..9b890d185 100644
--- a/src/core/dune
+++ b/src/core/dune
@@ -13,7 +13,6 @@ let () = Jbuild_plugin.V1.send @@ {|
  (synopsis "Monadic promises and concurrent I/O")
  (wrapped false)
  |} ^ preprocess ^ {|
- (libraries bytes)
  (flags (:standard -w +A-29)))
 
 (documentation