diff --git a/gui/package.json b/gui/package.json
index 51eda21349..f68b05571b 100644
--- a/gui/package.json
+++ b/gui/package.json
@@ -38,7 +38,7 @@
     "lucide-react": "^0.400.0",
     "next": "16.0.7",
     "next-auth": "5.0.0-beta.30",
-    "postcss": "^8.5.6",
+    "postcss": "^8.5.18",
     "prettier": "^3.7.4",
     "prop-types": "^15.8.1",
     "react": "19.2.1",
diff --git a/gui/pnpm-lock.yaml b/gui/pnpm-lock.yaml
index 87feb4f893..8b0984feaf 100644
--- a/gui/pnpm-lock.yaml
+++ b/gui/pnpm-lock.yaml
@@ -75,7 +75,7 @@ importers:
         version: 3.9.6(react-dom@19.2.1(react@19.2.1))(react@19.2.1)
       autoprefixer:
         specifier: ^10.4.22
-        version: 10.4.22(postcss@8.5.6)
+        version: 10.4.22(postcss@8.5.18)
       class-variance-authority:
         specifier: ^0.7.1
         version: 0.7.1
@@ -101,8 +101,8 @@ importers:
         specifier: 5.0.0-beta.30
         version: 5.0.0-beta.30(next@16.0.7(@babel/core@7.28.5)(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)
       postcss:
-        specifier: ^8.5.6
-        version: 8.5.6
+        specifier: ^8.5.18
+        version: 8.5.18
       prettier:
         specifier: ^3.7.4
         version: 3.7.4
@@ -3080,8 +3080,8 @@ packages:
   mz@2.7.0:
     resolution: {integrity: sha512-z81GNO7nnYMEhrGh9LeymoE4+Yr0Wn5McHIZMK5cfQCl+NDX08sCZgUc9/6MHni9IWuFLm1Z3HTCXu2z9fN62Q==}
 
-  nanoid@3.3.11:
-    resolution: {integrity: sha512-N8SpfPUnUp1bK+PMYW8qSWdl9U+wwNWI4QKxOYDy9JAro3WMX7p2OeVRF9v+347pnakNevPmiHhNmZ2HbFA76w==}
+  nanoid@3.3.16:
+    resolution: {integrity: sha512-bzlKTyNJ7+LdGIIwy8ijFpIqEQIvafahV7eYykJ8Cvh42EdJeODoJ6gUJXpQJvej1BddH8OqTXZNE/KfbWAu8Q==}
     engines: {node: ^10 || ^12 || ^13.7 || ^14 || >=15.0.1}
     hasBin: true
 
@@ -3317,8 +3317,8 @@ packages:
     resolution: {integrity: sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==}
     engines: {node: ^10 || ^12 || >=14}
 
-  postcss@8.5.6:
-    resolution: {integrity: sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==}
+  postcss@8.5.18:
+    resolution: {integrity: sha512-xdB1oSLHbz1vRWgCDalrCqEFTWzFlhqFC5tIHLMOSUIjhm3XXQ1qrFy8S/ESr1JYRRXqM3c1QFiMZUJdUTqyMQ==}
     engines: {node: ^10 || ^12 || >=14}
 
   postgres-array@3.0.4:
@@ -5811,14 +5811,14 @@ snapshots:
 
   async@3.2.6: {}
 
-  autoprefixer@10.4.22(postcss@8.5.6):
+  autoprefixer@10.4.22(postcss@8.5.18):
     dependencies:
       browserslist: 4.28.1
       caniuse-lite: 1.0.30001759
       fraction.js: 5.3.4
       normalize-range: 0.1.2
       picocolors: 1.1.1
-      postcss: 8.5.6
+      postcss: 8.5.18
       postcss-value-parser: 4.2.0
 
   available-typed-arrays@1.0.7:
@@ -6911,7 +6911,7 @@ snapshots:
       object-assign: 4.1.1
       thenify-all: 1.6.0
 
-  nanoid@3.3.11: {}
+  nanoid@3.3.16: {}
 
   napi-postinstall@0.3.4: {}
 
@@ -7086,29 +7086,29 @@ snapshots:
 
   possible-typed-array-names@1.1.0: {}
 
-  postcss-import@15.1.0(postcss@8.5.6):
+  postcss-import@15.1.0(postcss@8.5.18):
     dependencies:
-      postcss: 8.5.6
+      postcss: 8.5.18
       postcss-value-parser: 4.2.0
       read-cache: 1.0.0
       resolve: 1.22.11
 
-  postcss-js@4.1.0(postcss@8.5.6):
+  postcss-js@4.1.0(postcss@8.5.18):
     dependencies:
       camelcase-css: 2.0.1
-      postcss: 8.5.6
+      postcss: 8.5.18
 
-  postcss-load-config@6.0.1(jiti@1.21.7)(postcss@8.5.6)(yaml@2.4.5):
+  postcss-load-config@6.0.1(jiti@1.21.7)(postcss@8.5.18)(yaml@2.4.5):
     dependencies:
       lilconfig: 3.1.3
     optionalDependencies:
       jiti: 1.21.7
-      postcss: 8.5.6
+      postcss: 8.5.18
       yaml: 2.4.5
 
-  postcss-nested@6.2.0(postcss@8.5.6):
+  postcss-nested@6.2.0(postcss@8.5.18):
     dependencies:
-      postcss: 8.5.6
+      postcss: 8.5.18
       postcss-selector-parser: 6.1.2
 
   postcss-selector-parser@6.1.2:
@@ -7120,13 +7120,13 @@ snapshots:
 
   postcss@8.4.31:
     dependencies:
-      nanoid: 3.3.11
+      nanoid: 3.3.16
       picocolors: 1.1.1
       source-map-js: 1.2.1
 
-  postcss@8.5.6:
+  postcss@8.5.18:
     dependencies:
-      nanoid: 3.3.11
+      nanoid: 3.3.16
       picocolors: 1.1.1
       source-map-js: 1.2.1
 
@@ -7542,11 +7542,11 @@ snapshots:
       normalize-path: 3.0.0
       object-hash: 3.0.0
       picocolors: 1.1.1
-      postcss: 8.5.6
-      postcss-import: 15.1.0(postcss@8.5.6)
-      postcss-js: 4.1.0(postcss@8.5.6)
-      postcss-load-config: 6.0.1(jiti@1.21.7)(postcss@8.5.6)(yaml@2.4.5)
-      postcss-nested: 6.2.0(postcss@8.5.6)
+      postcss: 8.5.18
+      postcss-import: 15.1.0(postcss@8.5.18)
+      postcss-js: 4.1.0(postcss@8.5.18)
+      postcss-load-config: 6.0.1(jiti@1.21.7)(postcss@8.5.18)(yaml@2.4.5)
+      postcss-nested: 6.2.0(postcss@8.5.18)
       postcss-selector-parser: 6.1.2
       resolve: 1.22.11
       sucrase: 3.35.1