diff --git a/src/sphinx_antsibull_ext/css/package-lock.json b/src/sphinx_antsibull_ext/css/package-lock.json
index 96f09dce..9ba796ab 100644
--- a/src/sphinx_antsibull_ext/css/package-lock.json
+++ b/src/sphinx_antsibull_ext/css/package-lock.json
@@ -5,7 +5,7 @@
   "packages": {
     "": {
       "dependencies": {
-        "autoprefixer": "^10.4.20",
+        "autoprefixer": "^10.4.21",
         "cssnano": "^7.0.6",
         "postcss": "^8.5.3",
         "postcss-cli": "^11.0.0",
@@ -402,9 +402,9 @@
       }
     },
     "node_modules/autoprefixer": {
-      "version": "10.4.20",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.20.tgz",
-      "integrity": "sha512-XY25y5xSv/wEoqzDyXXME4AFfkZI0P23z6Fs3YgymDnKJkCGOnkL0iTxCa85UTqaSgfcqyf3UA6+c7wUvx/16g==",
+      "version": "10.4.21",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.21.tgz",
+      "integrity": "sha512-O+A6LWV5LDHSJD3LjHYoNi4VLsj/Whi7k6zG12xTYaU4cQ8oxQGckXNX8cRHK5yOZ/ppVHe0ZBXGzSV9jXdVbQ==",
       "funding": [
         {
           "type": "opencollective",
@@ -421,11 +421,11 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "browserslist": "^4.23.3",
-        "caniuse-lite": "^1.0.30001646",
+        "browserslist": "^4.24.4",
+        "caniuse-lite": "^1.0.30001702",
         "fraction.js": "^4.3.7",
         "normalize-range": "^0.1.2",
-        "picocolors": "^1.0.1",
+        "picocolors": "^1.1.1",
         "postcss-value-parser": "^4.2.0"
       },
       "bin": {
@@ -469,9 +469,9 @@
       }
     },
     "node_modules/browserslist": {
-      "version": "4.24.2",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.24.2.tgz",
-      "integrity": "sha512-ZIc+Q62revdMcqC6aChtW4jz3My3klmCO1fEmINZY/8J3EpBg5/A/D0AKmBveUh6pgoeycoMkVMko84tuYS+Gg==",
+      "version": "4.24.4",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.24.4.tgz",
+      "integrity": "sha512-KDi1Ny1gSePi1vm0q4oxSF8b4DR44GF4BbmS2YdhPLOEqd8pDviZOGH/GsmRwoWJ2+5Lr085X7naowMwKHDG1A==",
       "funding": [
         {
           "type": "opencollective",
@@ -488,9 +488,9 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "caniuse-lite": "^1.0.30001669",
-        "electron-to-chromium": "^1.5.41",
-        "node-releases": "^2.0.18",
+        "caniuse-lite": "^1.0.30001688",
+        "electron-to-chromium": "^1.5.73",
+        "node-releases": "^2.0.19",
         "update-browserslist-db": "^1.1.1"
       },
       "bin": {
@@ -513,9 +513,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001680",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001680.tgz",
-      "integrity": "sha512-rPQy70G6AGUMnbwS1z6Xg+RkHYPAi18ihs47GH0jcxIG7wArmPgY3XbS2sRdBbxJljp3thdT8BIqv9ccCypiPA==",
+      "version": "1.0.30001703",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001703.tgz",
+      "integrity": "sha512-kRlAGTRWgPsOj7oARC9m1okJEXdL/8fekFVcxA8Hl7GH4r/sN4OJn/i6Flde373T50KS7Y37oFbMwlE8+F42kQ==",
       "funding": [
         {
           "type": "opencollective",
@@ -855,9 +855,9 @@
       }
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.5.62",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.62.tgz",
-      "integrity": "sha512-t8c+zLmJHa9dJy96yBZRXGQYoiCEnHYgFwn1asvSPZSUdVxnB62A4RASd7k41ytG3ErFBA0TpHlKg9D9SQBmLg==",
+      "version": "1.5.114",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.114.tgz",
+      "integrity": "sha512-DFptFef3iktoKlFQK/afbo274/XNWD00Am0xa7M8FZUepHlHT8PEuiNBoRfFHbH1okqN58AlhbJ4QTkcnXorjA==",
       "license": "ISC"
     },
     "node_modules/emoji-regex": {
@@ -1180,9 +1180,9 @@
       "optional": true
     },
     "node_modules/node-releases": {
-      "version": "2.0.18",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.18.tgz",
-      "integrity": "sha512-d9VeXT4SJ7ZeOqGX6R5EM022wpL+eWPooLI+5UpWn2jCT1aosUQEhQP214x33Wkwx3JQMvIm+tIoVOdodFS40g==",
+      "version": "2.0.19",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.19.tgz",
+      "integrity": "sha512-xxOWJsBKtzAq7DY0J+DTzuz58K8e7sJbdgwkbMWQe8UYB6ekmsQ45q0M/tJDsGaZmbC+l7n57UV8Hl5tHxO9uw==",
       "license": "MIT"
     },
     "node_modules/normalize-path": {
diff --git a/src/sphinx_antsibull_ext/css/package.json b/src/sphinx_antsibull_ext/css/package.json
index 167f18cf..76ef3af0 100644
--- a/src/sphinx_antsibull_ext/css/package.json
+++ b/src/sphinx_antsibull_ext/css/package.json
@@ -1,6 +1,6 @@
 {
   "dependencies": {
-    "autoprefixer": "^10.4.20",
+    "autoprefixer": "^10.4.21",
     "cssnano": "^7.0.6",
     "postcss": "^8.5.3",
     "postcss-cli": "^11.0.0",