diff --git a/packages/@sanity/cli/src/util/readPackageJson.ts b/packages/@sanity/cli/src/util/readPackageJson.ts
index a2b2d5ad65..1784952dca 100644
--- a/packages/@sanity/cli/src/util/readPackageJson.ts
+++ b/packages/@sanity/cli/src/util/readPackageJson.ts
@@ -54,6 +54,6 @@ export async function readPackageJson(
   }
 
   throw new Error(
-    `Invalid package.json at "${filePath}": ${error.errors.map((err) => err.message).join('\n')}`,
+    `Invalid package.json at "${filePath}": ${error.issues.map((err) => err.message).join('\n')}`,
   )
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3cc979da9c..951dc04020 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -82,8 +82,8 @@ catalogs:
       specifier: ^3.2.4
       version: 3.2.4
     zod:
-      specifier: ^3.25.76
-      version: 3.25.76
+      specifier: ^4.3.5
+      version: 4.3.5
 
 overrides:
   '@sanity/client': ^7.14.0
@@ -475,7 +475,7 @@ importers:
         version: 5.0.0
       zod:
         specifier: 'catalog:'
-        version: 3.25.76
+        version: 4.3.5
     devDependencies:
       '@eslint/compat':
         specifier: 'catalog:'
@@ -617,7 +617,7 @@ importers:
         version: 3.2.4(@types/node@20.19.27)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2)
       zod:
         specifier: 'catalog:'
-        version: 3.25.76
+        version: 4.3.5
     devDependencies:
       '@eslint/compat':
         specifier: 'catalog:'
@@ -7505,8 +7505,8 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
-  zod@4.2.1:
-    resolution: {integrity: sha512-0wZ1IRqGGhMP76gLqz8EyfBXKk0J2qo2+H3fi4mcUP/KtTocoX08nmIAHl1Z2kJIZbZee8KOpBCSNPRgauucjw==}
+  zod@4.3.5:
+    resolution: {integrity: sha512-k7Nwx6vuWx1IJ9Bjuf4Zt1PEllcwe7cls3VNzm4CQ1/hgtFUK2bRNG3rvnpPUhFjmqJKAKtjV576KnUkHocg/g==}
 
   zustand@5.0.9:
     resolution: {integrity: sha512-ALBtUj0AfjJt3uNRQoL1tL2tMvj6Gp/6e39dnfT6uzpelGru8v1tPOGBzayOWbPJvujM8JojDk3E1LxeFisBNg==}
@@ -13665,7 +13665,7 @@ snapshots:
       smol-toml: 1.6.0
       strip-json-comments: 5.0.3
       typescript: 5.9.3
-      zod: 4.2.1
+      zod: 4.3.5
 
   lambda-runtimes@2.0.5: {}
 
@@ -16226,7 +16226,7 @@ snapshots:
 
   zod@3.25.76: {}
 
-  zod@4.2.1: {}
+  zod@4.3.5: {}
 
   zustand@5.0.9(@types/react@19.2.7)(react@19.2.3)(use-sync-external-store@1.6.0(react@19.2.3)):
     optionalDependencies:
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index fef751ae14..8036852bc2 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -38,7 +38,7 @@ catalog:
   # Utilities
   debug: ^4.4.3
   jsdom: ^27.4.0
-  zod: ^3.25.76
+  zod: ^4.3.5
   'get-tsconfig': ^4.13.0
   execa: ^9.6.0