diff --git a/CHANGELOG.md b/CHANGELOG.md
index 176be55..f986106 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Unreleased
 
+* Support Diff-1.0
+
 ## v0.1.0
 
 Initial release
diff --git a/skeletest.cabal b/skeletest.cabal
index 0b0d91c..ba1611c 100644
--- a/skeletest.cabal
+++ b/skeletest.cabal
@@ -75,7 +75,7 @@ library
     , aeson-pretty
     , ansi-terminal >= 0.4.0
     , containers
-    , Diff >= 0.5
+    , Diff >= 1.0
     , directory
     , filepath
     , ghc ^>= 9.6 || ^>= 9.8 || ^>= 9.10
diff --git a/src/Skeletest/Internal/Utils/Diff.hs b/src/Skeletest/Internal/Utils/Diff.hs
index 7768968..9bd8454 100644
--- a/src/Skeletest/Internal/Utils/Diff.hs
+++ b/src/Skeletest/Internal/Utils/Diff.hs
@@ -2,7 +2,8 @@ module Skeletest.Internal.Utils.Diff (
   showLineDiff,
 ) where
 
-import Data.Algorithm.DiffContext (getContextDiffNew, prettyContextDiff)
+import Data.Algorithm.DiffContext (getContextDiff, prettyContextDiff)
+import Data.Algorithm.DiffContext qualified as Diff
 import Data.Text (Text)
 import Data.Text qualified as Text
 import Text.PrettyPrint qualified as PP
@@ -10,7 +11,7 @@ import Text.PrettyPrint qualified as PP
 showLineDiff :: (Text, Text) -> (Text, Text) -> Text
 showLineDiff (fromName, fromContent) (toName, toContent) =
   Text.pack . PP.render $
-    prettyContextDiff (ppText fromName) (ppText toName) ppText $
-      getContextDiffNew (Just 5) (Text.lines fromContent) (Text.lines toContent)
+    prettyContextDiff (ppText fromName) (ppText toName) (ppText . Diff.unnumber) $
+      getContextDiff (Just 5) (Text.lines fromContent) (Text.lines toContent)
   where
     ppText = PP.text . Text.unpack
diff --git a/test/Skeletest/Internal/__snapshots__/SnapshotSpec.snap.md b/test/Skeletest/Internal/__snapshots__/SnapshotSpec.snap.md
index 21619cb..3c1f60e 100644
--- a/test/Skeletest/Internal/__snapshots__/SnapshotSpec.snap.md
+++ b/test/Skeletest/Internal/__snapshots__/SnapshotSpec.snap.md
@@ -33,7 +33,7 @@ Example
 Result differed from snapshot. Update snapshot with --update.
 --- expected
 +++ actual
-@@
+@@ -1,4 +1,4 @@
 +new1
  same1
 -old1