diff --git a/package.json b/package.json
index 254b11f..968555f 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "@ronilaukkarinen/gulp-stylelint": "~14.0.9",
     "browserslist": "~4.21.5",
     "bulma": "~0.9.4",
-    "cssnano": "~5.1.14",
+    "cssnano": "~5.1.15",
     "eslint": "~8.34.0",
     "eslint-config-standard": "~17.0.0",
     "eslint-plugin-compat": "~4.0.2",
diff --git a/yarn.lock b/yarn.lock
index 28ea6aa..0fd4065 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1066,7 +1066,7 @@ braces@^3.0.2, braces@~3.0.2:
   dependencies:
     fill-range "^7.0.1"
 
-browserslist@^4.0.0, browserslist@^4.16.6, browserslist@^4.16.8, browserslist@^4.21.4:
+browserslist@^4.0.0, browserslist@^4.16.8, browserslist@^4.21.4:
   version "4.21.4"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.21.4.tgz#e7496bbc67b9e39dd0f98565feccdcb0d4ff6987"
   integrity sha512-CBHJJdDmgjl3daYjN5Cp5kbTf1mUhZoS+beLklHIvkOWscs83YAhLlF3Wsh/lciQYAcbBJgTOD44VtG31ZM4Hw==
@@ -1576,22 +1576,22 @@ cssesc@^3.0.0:
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-3.0.0.tgz#37741919903b868565e1c09ea747445cd18983ee"
   integrity sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==
 
-cssnano-preset-default@^5.2.13:
-  version "5.2.13"
-  resolved "https://registry.yarnpkg.com/cssnano-preset-default/-/cssnano-preset-default-5.2.13.tgz#e7353b0c57975d1bdd97ac96e68e5c1b8c68e990"
-  integrity sha512-PX7sQ4Pb+UtOWuz8A1d+Rbi+WimBIxJTRyBdgGp1J75VU0r/HFQeLnMYgHiCAp6AR4rqrc7Y4R+1Rjk3KJz6DQ==
+cssnano-preset-default@^5.2.14:
+  version "5.2.14"
+  resolved "https://registry.yarnpkg.com/cssnano-preset-default/-/cssnano-preset-default-5.2.14.tgz#309def4f7b7e16d71ab2438052093330d9ab45d8"
+  integrity sha512-t0SFesj/ZV2OTylqQVOrFgEh5uanxbO6ZAdeCrNsUQ6fVuXwYTxJPNAGvGTxHbD68ldIJNec7PyYZDBrfDQ+6A==
   dependencies:
     css-declaration-sorter "^6.3.1"
     cssnano-utils "^3.1.0"
     postcss-calc "^8.2.3"
-    postcss-colormin "^5.3.0"
+    postcss-colormin "^5.3.1"
     postcss-convert-values "^5.1.3"
     postcss-discard-comments "^5.1.2"
     postcss-discard-duplicates "^5.1.0"
     postcss-discard-empty "^5.1.1"
     postcss-discard-overridden "^5.1.0"
     postcss-merge-longhand "^5.1.7"
-    postcss-merge-rules "^5.1.3"
+    postcss-merge-rules "^5.1.4"
     postcss-minify-font-values "^5.1.0"
     postcss-minify-gradients "^5.1.1"
     postcss-minify-params "^5.1.4"
@@ -1606,7 +1606,7 @@ cssnano-preset-default@^5.2.13:
     postcss-normalize-url "^5.1.0"
     postcss-normalize-whitespace "^5.1.1"
     postcss-ordered-values "^5.1.3"
-    postcss-reduce-initial "^5.1.1"
+    postcss-reduce-initial "^5.1.2"
     postcss-reduce-transforms "^5.1.0"
     postcss-svgo "^5.1.0"
     postcss-unique-selectors "^5.1.1"
@@ -1616,12 +1616,12 @@ cssnano-utils@^3.1.0:
   resolved "https://registry.yarnpkg.com/cssnano-utils/-/cssnano-utils-3.1.0.tgz#95684d08c91511edfc70d2636338ca37ef3a6861"
   integrity sha512-JQNR19/YZhz4psLX/rQ9M83e3z2Wf/HdJbryzte4a3NSuafyp9w/I4U+hx5C2S9g41qlstH7DEWnZaaj83OuEA==
 
-cssnano@~5.1.14:
-  version "5.1.14"
-  resolved "https://registry.yarnpkg.com/cssnano/-/cssnano-5.1.14.tgz#07b0af6da73641276fe5a6d45757702ebae2eb05"
-  integrity sha512-Oou7ihiTocbKqi0J1bB+TRJIQX5RMR3JghA8hcWSw9mjBLQ5Y3RWqEDoYG3sRNlAbCIXpqMoZGbq5KDR3vdzgw==
+cssnano@~5.1.15:
+  version "5.1.15"
+  resolved "https://registry.yarnpkg.com/cssnano/-/cssnano-5.1.15.tgz#ded66b5480d5127fcb44dac12ea5a983755136bf"
+  integrity sha512-j+BKgDcLDQA+eDifLx0EO4XSA56b7uut3BQFH+wbSaSTuGLuiyTa/wbRYthUXX8LC9mLg+WWKe8h+qJuwTAbHw==
   dependencies:
-    cssnano-preset-default "^5.2.13"
+    cssnano-preset-default "^5.2.14"
     lilconfig "^2.0.3"
     yaml "^1.10.2"
 
@@ -4732,12 +4732,12 @@ postcss-color-rebeccapurple@^8.0.0:
   dependencies:
     postcss-value-parser "^4.2.0"
 
-postcss-colormin@^5.3.0:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-colormin/-/postcss-colormin-5.3.0.tgz#3cee9e5ca62b2c27e84fce63affc0cfb5901956a"
-  integrity sha512-WdDO4gOFG2Z8n4P8TWBpshnL3JpmNmJwdnfP2gbk2qBA8PWwOYcmjmI/t3CmMeL72a7Hkd+x/Mg9O2/0rD54Pg==
+postcss-colormin@^5.3.1:
+  version "5.3.1"
+  resolved "https://registry.yarnpkg.com/postcss-colormin/-/postcss-colormin-5.3.1.tgz#86c27c26ed6ba00d96c79e08f3ffb418d1d1988f"
+  integrity sha512-UsWQG0AqTFQmpBegeLLc1+c3jIqBNB0zlDGRWR+dQ3pRKJL1oeMzyqmH3o2PIfn9MBdNrVPWhDbT769LxCTLJQ==
   dependencies:
-    browserslist "^4.16.6"
+    browserslist "^4.21.4"
     caniuse-api "^3.0.0"
     colord "^2.9.1"
     postcss-value-parser "^4.2.0"
@@ -4893,10 +4893,10 @@ postcss-merge-longhand@^5.1.7:
     postcss-value-parser "^4.2.0"
     stylehacks "^5.1.1"
 
-postcss-merge-rules@^5.1.3:
-  version "5.1.3"
-  resolved "https://registry.yarnpkg.com/postcss-merge-rules/-/postcss-merge-rules-5.1.3.tgz#8f97679e67cc8d08677a6519afca41edf2220894"
-  integrity sha512-LbLd7uFC00vpOuMvyZop8+vvhnfRGpp2S+IMQKeuOZZapPRY4SMq5ErjQeHbHsjCUgJkRNrlU+LmxsKIqPKQlA==
+postcss-merge-rules@^5.1.4:
+  version "5.1.4"
+  resolved "https://registry.yarnpkg.com/postcss-merge-rules/-/postcss-merge-rules-5.1.4.tgz#2f26fa5cacb75b1402e213789f6766ae5e40313c"
+  integrity sha512-0R2IuYpgU93y9lhVbO/OylTtKMVcHb67zjWIfCiKR9rWL3GUk1677LAqD/BcHizukdZEjT8Ru3oHRoAYoJy44g==
   dependencies:
     browserslist "^4.21.4"
     caniuse-api "^3.0.0"
@@ -5104,10 +5104,10 @@ postcss-pseudo-class-any-link@^8.0.0:
   dependencies:
     postcss-selector-parser "^6.0.10"
 
-postcss-reduce-initial@^5.1.1:
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-reduce-initial/-/postcss-reduce-initial-5.1.1.tgz#c18b7dfb88aee24b1f8e4936541c29adbd35224e"
-  integrity sha512-//jeDqWcHPuXGZLoolFrUXBDyuEGbr9S2rMo19bkTIjBQ4PqkaO+oI8wua5BOUxpfi97i3PCoInsiFIEBfkm9w==
+postcss-reduce-initial@^5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/postcss-reduce-initial/-/postcss-reduce-initial-5.1.2.tgz#798cd77b3e033eae7105c18c9d371d989e1382d6"
+  integrity sha512-dE/y2XRaqAi6OvjzD22pjTUQ8eOfc6m/natGHgKFBK9DxFmIm69YmaRVQrGgFlEfc1HePIurY0TmDeROK05rIg==
   dependencies:
     browserslist "^4.21.4"
     caniuse-api "^3.0.0"