diff --git a/packages/shadcn-ui/package.json b/packages/shadcn-ui/package.json
index fab868b9..ad5ed250 100644
--- a/packages/shadcn-ui/package.json
+++ b/packages/shadcn-ui/package.json
@@ -57,7 +57,7 @@
     "radix-ui": "latest",
     "react-day-picker": "9.14.0",
     "react-hook-form": "^7.65.0",
-    "react-resizable-panels": "^3.0.6",
+    "react-resizable-panels": "^4.8.0",
     "recharts": "2.15.4",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.5.0",
diff --git a/packages/shadcn-ui/src/components/separator.tsx b/packages/shadcn-ui/src/components/separator.tsx
index c9737d58..a3a3483a 100644
--- a/packages/shadcn-ui/src/components/separator.tsx
+++ b/packages/shadcn-ui/src/components/separator.tsx
@@ -11,7 +11,7 @@ function Separator({
   return (
     <SeparatorPrimitive.Root
       className={cn(
-        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:w-px data-vertical:self-stretch h-[1px]",
+        "shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:w-px data-vertical:self-stretch h-px",
         className
       )}
       data-slot="separator"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 97a55955..0260f272 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1047,8 +1047,8 @@ importers:
         specifier: ^7.65.0
         version: 7.66.0(react@19.2.0)
       react-resizable-panels:
-        specifier: ^3.0.6
-        version: 3.0.6(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+        specifier: ^4.8.0
+        version: 4.8.0(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       recharts:
         specifier: 2.15.4
         version: 2.15.4(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
@@ -6077,11 +6077,11 @@ packages:
       '@types/react':
         optional: true
 
-  react-resizable-panels@3.0.6:
-    resolution: {integrity: sha512-b3qKHQ3MLqOgSS+FRYKapNkJZf5EQzuf6+RLiq1/IlTHw99YrZ2NJZLk4hQIzTnnIkRg2LUqyVinu6YWWpUYew==}
+  react-resizable-panels@4.8.0:
+    resolution: {integrity: sha512-2uEABkewb3ky/ZgIlAUxWa1W/LjsK494fdV1QsXxst7CDRHCzo7h22tWWu3NNaBjmiuriOCt3CvhipnaYcpoIw==}
     peerDependencies:
-      react: ^16.14.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
-      react-dom: ^16.14.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
+      react: ^18.0.0 || ^19.0.0
+      react-dom: ^18.0.0 || ^19.0.0
 
   react-router-dom@6.30.1:
     resolution: {integrity: sha512-llKsgOkZdbPU1Eg3zK8lCn+sjD9wMRZZPuzmdWWX5SUs8OFkN5HnFVC0u5KMeMaC9aoancFI/KoLuKPqN+hxHw==}
@@ -12322,7 +12322,7 @@ snapshots:
     optionalDependencies:
       '@types/react': 19.2.2
 
-  react-resizable-panels@3.0.6(react-dom@19.2.0(react@19.2.0))(react@19.2.0):
+  react-resizable-panels@4.8.0(react-dom@19.2.0(react@19.2.0))(react@19.2.0):
     dependencies:
       react: 19.2.0
       react-dom: 19.2.0(react@19.2.0)