diff --git a/apps/desktop-ui/package.json b/apps/desktop-ui/package.json
index 4ce1c419..913da240 100644
--- a/apps/desktop-ui/package.json
+++ b/apps/desktop-ui/package.json
@@ -76,7 +76,7 @@
     "file-saver": "^2.0.5",
     "framer-motion": "^12.43.0",
     "geist": "^1.7.2",
-    "gpt-tokenizer": "^3.4.0",
+    "gpt-tokenizer": "^4.0.0",
     "graphql": "^16.14.2",
     "highlight.js": "^11.12.0",
     "html-to-image": "^1.11.13",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 958a2d9e..228d0402 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -207,8 +207,8 @@ importers:
         specifier: ^1.7.2
         version: 1.7.2(next@16.3.2(@types/node@24.13.3)(react-dom@19.2.8(react@19.2.8))(react@19.2.8))
       gpt-tokenizer:
-        specifier: ^3.4.0
-        version: 3.4.0
+        specifier: ^4.0.0
+        version: 4.0.0
       graphql:
         specifier: ^16.14.2
         version: 16.14.2
@@ -5025,8 +5025,8 @@ packages:
     resolution: {integrity: sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg==}
     engines: {node: '>= 0.4'}
 
-  gpt-tokenizer@3.4.0:
-    resolution: {integrity: sha512-wxFLnhIXTDjYebd9A9pGl3e31ZpSypbpIJSOswbgop5jLte/AsZVDvjlbEuVFlsqZixVKqbcoNmRlFDf6pz/UQ==}
+  gpt-tokenizer@4.0.0:
+    resolution: {integrity: sha512-YAWIyzvuVUHEfW7tFfFAxH8qQb+Q3RU9nYOTy7skMNX5qzU6Q8jxTHZLyO56ug1vYvCR7wndzpd3jwD86/mhjQ==}
 
   graceful-fs@4.2.11:
     resolution: {integrity: sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==}
@@ -12898,7 +12898,7 @@ snapshots:
 
   gopd@1.2.0: {}
 
-  gpt-tokenizer@3.4.0: {}
+  gpt-tokenizer@4.0.0: {}
 
   graceful-fs@4.2.11: {}