diff --git a/.changeset/dependencies-GH-187.md b/.changeset/dependencies-GH-187.md
new file mode 100644
index 0000000..46045d8
--- /dev/null
+++ b/.changeset/dependencies-GH-187.md
@@ -0,0 +1,5 @@
+---
+"@portabletext/svelte": patch
+---
+
+fix(deps): update dependency @portabletext/toolkit to v3
diff --git a/package.json b/package.json
index 82846b0..00fae8f 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "test": "vitest"
   },
   "dependencies": {
-    "@portabletext/toolkit": "^2.0.18"
+    "@portabletext/toolkit": "^3.0.3"
   },
   "devDependencies": {
     "@changesets/changelog-github": "^0.5.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c4a674f..321e100 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -9,8 +9,8 @@ importers:
   .:
     dependencies:
       '@portabletext/toolkit':
-        specifier: ^2.0.18
-        version: 2.0.18
+        specifier: ^3.0.3
+        version: 3.0.3
     devDependencies:
       '@changesets/changelog-github':
         specifier: ^0.5.1
@@ -20,7 +20,7 @@ importers:
         version: 2.29.6
       '@portabletext/types':
         specifier: ^2.0.13
-        version: 2.0.14
+        version: 2.0.15
       '@sveltejs/adapter-auto':
         specifier: ^3.2.1
         version: 3.3.1(@sveltejs/kit@2.36.1(@sveltejs/vite-plugin-svelte@4.0.4(svelte@5.38.2)(vite@5.4.19))(svelte@5.38.2)(vite@5.4.19))
@@ -413,12 +413,12 @@ packages:
   '@polka/url@1.0.0-next.29':
     resolution: {integrity: sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==}
 
-  '@portabletext/toolkit@2.0.18':
-    resolution: {integrity: sha512-m3v2WwKQTNNk5BFZlUuPuCW0Zi6iDSpwrium4Ej5L2FHDXhFuwAyEMPXDrvwPvqjES/oJzcwmdKLMhYa44T9BQ==}
+  '@portabletext/toolkit@3.0.3':
+    resolution: {integrity: sha512-EI59/l4E0E5wCyWUzvW1FPKWfqDsbebCnCf9ZDHjXGH95X4EORlCtnPuA79PpKaHv0LTChORy55trRzW6tYnOQ==}
     engines: {node: ^14.13.1 || >=16.0.0}
 
-  '@portabletext/types@2.0.14':
-    resolution: {integrity: sha512-LnAanK3vkn30gMqtGv5QoR0QT3fioOgqh1SBIiquAbtBcoETxhdvCfEMnv5CAuFiZMFLyRIgfpjWyIIVA2yOjQ==}
+  '@portabletext/types@2.0.15':
+    resolution: {integrity: sha512-2e6i2gSQsrA/5OL5Gm4/9bxB9MNO73Fa47zj+0mT93xkoQUCGCWX5fZh1YBJ86hszaRYlqvqG08oULxvvPPp/Q==}
     engines: {node: ^14.13.1 || >=16.0.0 || >=18.0.0}
 
   '@rollup/rollup-android-arm-eabi@4.47.1':
@@ -1122,12 +1122,12 @@ packages:
 
   glob@7.2.3:
     resolution: {integrity: sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==}
-    deprecated: Glob versions prior to v9 are no longer supported
+    deprecated: Old versions of glob are not supported, and contain widely publicized security vulnerabilities, which have been fixed in the current version. Please update. Support for old versions may be purchased (at exorbitant rates) by contacting i@izs.me
 
   glob@8.1.0:
     resolution: {integrity: sha512-r8hpEjiQEYlF2QU0df3dS+nxxSIreXQS1qRhMJM0Q5NDdR386C7jb7Hwwod8Fgiuex+k0GFjgft18yvxm5XoCQ==}
     engines: {node: '>=12'}
-    deprecated: Glob versions prior to v9 are no longer supported
+    deprecated: Old versions of glob are not supported, and contain widely publicized security vulnerabilities, which have been fixed in the current version. Please update. Support for old versions may be purchased (at exorbitant rates) by contacting i@izs.me
 
   globals@13.24.0:
     resolution: {integrity: sha512-AhO5QUcj8llrbG09iWhPU2B204J1xnPeL8kQmVorSsy+Sjj1sk8gIyh6cUocGmH4L0UuhAJy+hJMRA4mgA4mFQ==}
@@ -1903,6 +1903,7 @@ packages:
   whatwg-encoding@3.1.1:
     resolution: {integrity: sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==}
     engines: {node: '>=18'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-mimetype@4.0.0:
     resolution: {integrity: sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==}
@@ -2321,11 +2322,11 @@ snapshots:
 
   '@polka/url@1.0.0-next.29': {}
 
-  '@portabletext/toolkit@2.0.18':
+  '@portabletext/toolkit@3.0.3':
     dependencies:
-      '@portabletext/types': 2.0.14
+      '@portabletext/types': 2.0.15
 
-  '@portabletext/types@2.0.14': {}
+  '@portabletext/types@2.0.15': {}
 
   '@rollup/rollup-android-arm-eabi@4.47.1':
     optional: true