diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 Changelog
 =========
 
+Version 0.4.0.1
+---------------
+
+*September 10, 2024*
+
+<https://github.com/mstksg/uncertain/releases/tag/v0.4.0.1>
+
+* Fix missing import for some versions of base
+
 Version 0.4.0.0
 ---------------
 
diff --git a/src/Numeric/Uncertain.hs b/src/Numeric/Uncertain.hs
--- a/src/Numeric/Uncertain.hs
+++ b/src/Numeric/Uncertain.hs
@@ -57,7 +57,7 @@
 where
 
 import Data.Data
-import Data.Foldable (toList)
+import Data.Foldable
 import Data.Function
 import Data.Hople
 import Data.Ord
diff --git a/uncertain.cabal b/uncertain.cabal
--- a/uncertain.cabal
+++ b/uncertain.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:               uncertain
-version:            0.4.0.0
+version:            0.4.0.1
 synopsis:
   Manipulating numbers with inherent experimental/measurement uncertainty