diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+### 1.3.2.6
+
+_2026-08-13 Andreas Abel_
+
+- Address deprecation warning for (Data.IntSet.fold) ([#76](https://github.com/haskell-hvr/regex-tdfa/issues/76))
+- Tested with GHC 8.0 - 9.14.1
+
 ### 1.3.2.5
 
 _2025-09-29 Andreas Abel_
diff --git a/lib/Data/IntSet/EnumSet2.hs b/lib/Data/IntSet/EnumSet2.hs
--- a/lib/Data/IntSet/EnumSet2.hs
+++ b/lib/Data/IntSet/EnumSet2.hs
@@ -81,7 +81,7 @@
   where f' b = fromEnum (f (toEnum b))
 
 fold :: (Enum e) => (e -> b -> b) -> b -> EnumSet e -> b
-fold f a (EnumSet s) = S.fold f' a s
+fold f a (EnumSet s) = S.foldr f' a s
   where f' b a1 = f (toEnum b) a1
 
 elems :: (Enum e) => EnumSet e -> [e]
diff --git a/regex-tdfa.cabal b/regex-tdfa.cabal
--- a/regex-tdfa.cabal
+++ b/regex-tdfa.cabal
@@ -1,6 +1,6 @@
 cabal-version:          2.0
 name:                   regex-tdfa
-version:                1.3.2.5
+version:                1.3.2.6
 
 build-Type:             Simple
 license:                BSD3
@@ -27,7 +27,8 @@
   test/cases/*.txt
 
 tested-with:
-  GHC == 9.12.2
+  GHC == 9.14.1
+  GHC == 9.12.4
   GHC == 9.10.3
   GHC == 9.8.4
   GHC == 9.6.7
@@ -48,7 +49,7 @@
 source-repository this
   type:                git
   location:            https://github.com/haskell-hvr/regex-tdfa.git
-  tag:                 v1.3.2.5
+  tag:                 v1.3.2.6
 
 flag force-O2
   default: False