diff --git a/package.json b/package.json
index bfe6bb7..3280067 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "@ember/render-modifiers": "^2.0.4",
     "@ember/test-helpers": "^2.6.0",
     "@embroider/test-setup": "^1.8.0",
-    "@fullhuman/postcss-purgecss": "^4.1.3",
+    "@fullhuman/postcss-purgecss": "^5.0.0",
     "@glimmer/component": "^1.0.4",
     "@glimmer/tracking": "^1.0.4",
     "broccoli-asset-rev": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index 57c4fa8..855ac01 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1586,12 +1586,12 @@
     postcss "7.0.32"
     purgecss "^2.3.0"
 
-"@fullhuman/postcss-purgecss@^4.1.3":
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.1.3.tgz#e4eb21fc7a49257e4081c6a3a86b338618e61fce"
-  integrity sha512-jqcsyfvq09VOsMXxJMPLRF6Fhg/NNltzWKnC9qtzva+QKTxerCO4esG6je7hbnmkpZtaDyPTwMBj9bzfWorsrw==
+"@fullhuman/postcss-purgecss@^5.0.0":
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-5.0.0.tgz#70db9a537c73750fbcf745b49573db758daba1d8"
+  integrity sha512-onDS/b/2pMRzqSoj4qOs2tYFmOpaspjTAgvACIHMPiicu1ptajiBruTrjBzTKdxWdX0ldaBb7wj8nEaTLyFkJw==
   dependencies:
-    purgecss "^4.1.3"
+    purgecss "^5.0.0"
 
 "@glimmer/component@^1.0.4":
   version "1.1.2"
@@ -3371,6 +3371,13 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
+brace-expansion@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.1.tgz#1edc459e0f0c548486ecf9fc99f2221364b9a0ae"
+  integrity sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==
+  dependencies:
+    balanced-match "^1.0.0"
+
 braces@^2.3.1, braces@^2.3.2:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.2.tgz#5979fd3f14cd531565e5fa2df1abfff1dfaee729"
@@ -4694,11 +4701,16 @@ commander@^5.0.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-5.1.0.tgz#46abbd1652f8e059bddaef99bbdcb2ad9cf179ae"
   integrity sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==
 
-commander@^8.0.0, commander@^8.3.0:
+commander@^8.3.0:
   version "8.3.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-8.3.0.tgz#4837ea1b2da67b9c616a67afbb0fafee567bca66"
   integrity sha512-OkTL9umf+He2DZkUq8f8J9of7yL6RJKI24dVITBmNfZBmri9zYZQrKkuXiKhyfPSu8tUhnVBB1iKXevvnlR4Ww==
 
+commander@^9.0.0:
+  version "9.4.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-9.4.1.tgz#d1dd8f2ce6faf93147295c0df13c7c21141cfbdd"
+  integrity sha512-5EEkTNyHNGFPD2H+c/dXXfQZYa/scCKasxWcXJaWnNJ99pnQN9Vnmqow+p+PlFPE63Q6mThaZws1T+HxfpgtPw==
+
 common-tags@^1.8.0:
   version "1.8.2"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.8.2.tgz#94ebb3c076d26032745fd54face7f688ef5ac9c6"
@@ -7998,7 +8010,7 @@ glob@^5.0.10:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.4, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6, glob@^7.1.7:
+glob@^7.0.0, glob@^7.0.4, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
   version "7.2.3"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.2.3.tgz#b8df0fb802bbfa8e89bd1d938b4e16578ed44f2b"
   integrity sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==
@@ -8010,6 +8022,17 @@ glob@^7.0.0, glob@^7.0.4, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, gl
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^8.0.3:
+  version "8.0.3"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-8.0.3.tgz#415c6eb2deed9e502c68fa44a272e6da6eeca42e"
+  integrity sha512-ull455NHSHI/Y1FqGaaYFaLGkNMMJbavMrEGFXG/PGrg6y7sutWHUHrz6gy6WEBH6akM1M414dWKCNs+IhKdiQ==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^5.0.1"
+    once "^1.3.0"
+
 global-modules@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/global-modules/-/global-modules-1.0.0.tgz#6d770f0eb523ac78164d72b5e71a8877265cc3ea"
@@ -9994,6 +10017,13 @@ minimalistic-crypto-utils@^1.0.1:
   dependencies:
     brace-expansion "^1.1.7"
 
+minimatch@^5.0.1:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-5.1.0.tgz#1717b464f4971b144f6aabe8f2d0b8e4511e09c7"
+  integrity sha512-9TPBGGak4nHfGZsPBohm9AWg6NoT7QTCehS3BIJABslyZbzxfV78QM2Y6+i741OPZIafFAaiiEMh5OyIrJPgtg==
+  dependencies:
+    brace-expansion "^2.0.1"
+
 minimist@>=1.2.5, minimist@^1.1.1, minimist@^1.2.0, minimist@^1.2.5, minimist@^1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.6.tgz#8637a5b759ea0d6e98702cfb3a9283323c93af44"
@@ -11008,7 +11038,7 @@ postcss-scss@^4.0.0:
   resolved "https://registry.yarnpkg.com/postcss-scss/-/postcss-scss-4.0.4.tgz#aa8f60e19ee18259bc193db9e4b96edfce3f3b1f"
   integrity sha512-aBBbVyzA8b3hUL0MGrpydxxXKXFZc5Eqva0Q3V9qsBOLEMsjb6w49WfpsoWzpEgcqJGW4t7Rio8WXVU9Gd8vWg==
 
-postcss-selector-parser@^6.0.0, postcss-selector-parser@^6.0.2, postcss-selector-parser@^6.0.4, postcss-selector-parser@^6.0.6:
+postcss-selector-parser@^6.0.0, postcss-selector-parser@^6.0.2, postcss-selector-parser@^6.0.4, postcss-selector-parser@^6.0.6, postcss-selector-parser@^6.0.7:
   version "6.0.10"
   resolved "https://registry.yarnpkg.com/postcss-selector-parser/-/postcss-selector-parser-6.0.10.tgz#79b61e2c0d1bfc2602d549e11d0876256f8df88d"
   integrity sha512-IQ7TZdoaqbT+LCpShg46jnZVlhWD2w6iQYAcYXfHARZ7X1t/UGhhceQDs5X0cGqKvYlHNOuv7Oa1xmb0oQuA3w==
@@ -11052,10 +11082,10 @@ postcss@^7.0.11, postcss@^7.0.14, postcss@^7.0.18, postcss@^7.0.32:
     picocolors "^0.2.1"
     source-map "^0.6.1"
 
-postcss@^8.1.4, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.5, postcss@^8.3.6:
-  version "8.4.14"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.14.tgz#ee9274d5622b4858c1007a74d76e42e56fd21caf"
-  integrity sha512-E398TUmfAYFPBSdzgeieK2Y1+1cpdxJx8yXbK/m57nRhKSmk1GB2tO4lbLBtlkfPQTDKfe4Xqv1ASWPpayPEig==
+postcss@^8.1.4, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.6, postcss@^8.4.4:
+  version "8.4.18"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.18.tgz#6d50046ea7d3d66a85e0e782074e7203bc7fbca2"
+  integrity sha512-Wi8mWhncLJm11GATDaQKobXSNEYGUHeQLiQqDFG1qQ5UTDPTEvKw0Xt5NsTpktGTwLps3ByrWsBrG0rB8YQ9oA==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"
@@ -11243,15 +11273,15 @@ purgecss@^2.3.0:
     postcss "7.0.32"
     postcss-selector-parser "^6.0.2"
 
-purgecss@^4.1.3:
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-4.1.3.tgz#683f6a133c8c4de7aa82fe2746d1393b214918f7"
-  integrity sha512-99cKy4s+VZoXnPxaoM23e5ABcP851nC2y2GROkkjS8eJaJtlciGavd7iYAw2V84WeBqggZ12l8ef44G99HmTaw==
+purgecss@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-5.0.0.tgz#08526ba3fef95e42c54503ca59d3f2ee8d6e5189"
+  integrity sha512-RAnuxrGuVyLLTr8uMbKaxDRGWMgK5CCYDfRyUNNcaz5P3kGgD2b7ymQGYEyo2ST7Tl/ScwFgf5l3slKMxHSbrw==
   dependencies:
-    commander "^8.0.0"
-    glob "^7.1.7"
-    postcss "^8.3.5"
-    postcss-selector-parser "^6.0.6"
+    commander "^9.0.0"
+    glob "^8.0.3"
+    postcss "^8.4.4"
+    postcss-selector-parser "^6.0.7"
 
 q@^1.1.2:
   version "1.5.1"