diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f11adb4..f905ef7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -20,8 +20,8 @@ importers:
         specifier: ^5.3.0
         version: 5.3.0
       '@pierre/diffs':
-        specifier: ^1.3.2
-        version: 1.3.2(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)
+        specifier: ^1.4.2
+        version: 1.4.2(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)
       '@pierre/trees':
         specifier: 1.0.0-beta.6
         version: 1.0.0-beta.6(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)
@@ -574,11 +574,16 @@ packages:
     cpu: [x64]
     os: [win32]
 
-  '@pierre/diffs@1.3.2':
-    resolution: {integrity: sha512-+aSaxN/fGwmegUF/UVkXOOA8Run+sYOqhqTc1JvlieoYXsW/9KykOIR88FvgXjesI0MGZJLsX8dthn3+x2kymA==}
+  '@pierre/diffs@1.4.2':
+    resolution: {integrity: sha512-X9njBs6fGN+BIBhJ/otJRcxzNfsU3fd31VNquPiRW5nK051IyjuNS5JuOunqFDmEN3VCS9fm0gauyka/nMdokg==}
     peerDependencies:
       react: ^18.3.1 || ^19.0.0
       react-dom: ^18.3.1 || ^19.0.0
+    peerDependenciesMeta:
+      react:
+        optional: true
+      react-dom:
+        optional: true
 
   '@pierre/theme@2.0.0':
     resolution: {integrity: sha512-yNDd9GYLQl1mEUJR8AneJ5e4ohLIHQd/wZLWr4fagt78vS2RwwZNW530vVgHqXFAyFVcFlRmGUD5ramXH46OXw==}
@@ -604,6 +609,26 @@ packages:
       shiki:
         optional: true
 
+  '@pierre/theming@1.0.1':
+    resolution: {integrity: sha512-WCI5Qd7iprDpISL9fBYOLe8RV53+b7mFNA3bPzl60/2CKCSrsKN8zEcep6Y3BAzvARlmca50zGjDodqPGiTUKA==}
+    peerDependencies:
+      '@pierre/theme': ^1.1.0 || ^2.0.0
+      '@shikijs/themes': ^3.0.0 || ^4.0.0
+      react: ^18.3.1 || ^19.0.0
+      react-dom: ^18.3.1 || ^19.0.0
+      shiki: ^3.0.0 || ^4.0.0
+    peerDependenciesMeta:
+      '@pierre/theme':
+        optional: true
+      '@shikijs/themes':
+        optional: true
+      react:
+        optional: true
+      react-dom:
+        optional: true
+      shiki:
+        optional: true
+
   '@pierre/trees@1.0.0-beta.6':
     resolution: {integrity: sha512-zxeuSFM9TveM7b5XofweJALCtm/tGYV9HZzdbf7Uf+kBxIlUyz24/EHaGRjB0dsmmfDQl2ETz7AWwJ15lhSnpw==}
     peerDependencies:
@@ -3147,17 +3172,18 @@ snapshots:
   '@oxlint/binding-win32-x64-msvc@1.77.0':
     optional: true
 
-  '@pierre/diffs@1.3.2(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)':
+  '@pierre/diffs@1.4.2(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)':
     dependencies:
       '@pierre/theme': 2.0.0
-      '@pierre/theming': 1.0.0(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)
+      '@pierre/theming': 1.0.1(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)
       '@shikijs/transformers': 4.4.1
       diff: 9.0.0
       hast-util-to-html: 9.0.5
       lru_map: 0.4.1
+      shiki: 4.4.1
+    optionalDependencies:
       react: 19.2.8
       react-dom: 19.2.8(react@19.2.8)
-      shiki: 4.4.1
     transitivePeerDependencies:
       - '@shikijs/themes'
 
@@ -3171,6 +3197,14 @@ snapshots:
       react-dom: 19.2.8(react@19.2.8)
       shiki: 4.4.1
 
+  '@pierre/theming@1.0.1(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)':
+    optionalDependencies:
+      '@pierre/theme': 2.0.0
+      '@shikijs/themes': 4.4.1
+      react: 19.2.8
+      react-dom: 19.2.8(react@19.2.8)
+      shiki: 4.4.1
+
   '@pierre/trees@1.0.0-beta.6(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)':
     dependencies:
       '@pierre/theming': 1.0.0(@pierre/theme@2.0.0)(@shikijs/themes@4.4.1)(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(shiki@4.4.1)
diff --git a/web/package.json b/web/package.json
index dd3bf27..fb33a5f 100644
--- a/web/package.json
+++ b/web/package.json
@@ -15,7 +15,7 @@
     "@base-ui/react": "^1.7.0",
     "@fontsource-variable/inter": "^5.3.0",
     "@fontsource/jetbrains-mono": "^5.3.0",
-    "@pierre/diffs": "^1.3.2",
+    "@pierre/diffs": "^1.4.2",
     "@pierre/trees": "1.0.0-beta.6",
     "@tabler/icons-react": "^3.46.0",
     "@tailwindcss/vite": "^4.3.3",
diff --git a/web/src/components/DiffView.tsx b/web/src/components/DiffView.tsx
index f12fb07..eaa52c0 100644
--- a/web/src/components/DiffView.tsx
+++ b/web/src/components/DiffView.tsx
@@ -378,7 +378,7 @@ export function DiffView({ source = "pr" }: { source?: "pr" | "local" | "branch"
     branchBase?: string;
   } | null>(null);
   const repoContextRequested = useRef(false);
-  const viewerRef = useRef<CodeViewHandle<AnnotationMeta> | null>(null);
+  const viewerRef = useRef<CodeViewHandle<AnnotationMeta, undefined> | null>(null);
   const codeViewAreaRef = useRef<HTMLDivElement>(null);
   const currentFileRef = useRef<string | null>(null);
   const programmaticScrollAtRef = useRef(0);