diff --git a/.gitattributes b/.gitattributes
index 82fdc2ba57..88706d843d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -15,3 +15,4 @@ evm/contracts/proto/** linguist-generated
 *.lockb binary diff=lockb
 *.zip filter=lfs diff=lfs merge=lfs -text
 site/public/union-logo.zip filter=lfs diff=lfs merge=lfs -text
+biome.json linguist-language=JSON-with-Comments
diff --git a/app/src/lib/queries/balance/evm/multicall.ts b/app/src/lib/queries/balance/evm/multicall.ts
index 963a631a46..40ef36e443 100644
--- a/app/src/lib/queries/balance/evm/multicall.ts
+++ b/app/src/lib/queries/balance/evm/multicall.ts
@@ -51,7 +51,7 @@ export async function erc20ReadMulticall({
     (accumulator, { result }, index) => {
       if (index % functionNames.length === 0) accumulator.push({})
 
-      const currentResult = accumulator[accumulator.length - 1]
+      const currentResult = accumulator.at(-1)
       const fn = functionNames[index % functionNames.length]
       currentResult[fn === "balanceOf" ? "balance" : fn] = result ?? (fn === "decimals" ? 0 : "")
       return accumulator
diff --git a/biome.json b/biome.json
index 124bed0a8f..5b3a07e6b9 100644
--- a/biome.json
+++ b/biome.json
@@ -224,6 +224,7 @@
         "noSecrets": "off",
         "noProcessEnv": "off",
         "useStrictMode": "off",
+        "useExplicitType": "off",
         "noNestedTernary": "off",
         "noExportedImports": "off",
         "useImportRestrictions": "off",
diff --git a/ceremony/src/lib/utils/utils.ts b/ceremony/src/lib/utils/utils.ts
index d07b855fa1..d3cb6cc456 100644
--- a/ceremony/src/lib/utils/utils.ts
+++ b/ceremony/src/lib/utils/utils.ts
@@ -127,5 +127,5 @@ export function formatWaitTime(minutes: number) {
     return parts[0]
   }
 
-  return `${parts.slice(0, -1).join(", ")} and ${parts[parts.length - 1]}`
+  return `${parts.slice(0, -1).join(", ")} and ${parts.at(-1)}`
 }
diff --git a/dictionary.txt b/dictionary.txt
index c4124087b2..c7942e5077 100644
--- a/dictionary.txt
+++ b/dictionary.txt
@@ -508,6 +508,7 @@ deferredacktypes
 defi
 delegators
 dels
+deno
 denoms
 denum
 depinject
diff --git a/flake.nix b/flake.nix
index b9ae27d828..702ce691be 100644
--- a/flake.nix
+++ b/flake.nix
@@ -494,10 +494,11 @@
                 yq
               ])
               ++ (with jsPkgs; [
-                bun # for running TypeScript files on the fly
+                bun
+                deno
                 emmet-language-server
-                nodePackages.graphqurl
                 nodePackages_latest.nodejs
+                nodePackages_latest.graphqurl
                 nodePackages_latest.svelte-language-server
                 nodePackages_latest."@astrojs/language-server"
                 nodePackages_latest."@tailwindcss/language-server"
diff --git a/site/src/lib/contentful/live-preview.ts b/site/src/lib/contentful/live-preview.ts
index 3c67209f8c..26641ce019 100644
--- a/site/src/lib/contentful/live-preview.ts
+++ b/site/src/lib/contentful/live-preview.ts
@@ -49,11 +49,13 @@ export function setupLivePreview({
 }) {
   const callback = (updatedData: any) => {
     const domElement = findElementByDataAttribute({ entryId, fieldId })
-    if (domElement && updatedData.fields && updatedData.fields[fieldId]) {
-      // Check if the content is text
-      if (typeof updatedData.fields[fieldId] === "string") {
-        domElement.textContent = updatedData.fields[fieldId]
-      }
+    if (
+      domElement &&
+      updatedData.fields &&
+      updatedData.fields[fieldId] &&
+      typeof updatedData.fields[fieldId] === "string"
+    ) {
+      domElement.textContent = updatedData.fields[fieldId]
     }
   }
   const unsubscribe = ContentfulLivePreview.subscribe({