diff --git a/package.json b/package.json
index b92e21fe29d..27603d4735d 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "ember-cli": "~3.16.0",
     "ember-cli-accounting": "^2.0.2",
     "ember-cli-app-version": "^3.2.0",
-    "ember-cli-autoprefixer": "0.8.1",
+    "ember-cli-autoprefixer": "1.0.0",
     "ember-cli-babel": "^7.18.0",
     "ember-cli-cjs-transform": "^2.0.0",
     "ember-cli-clipboard": "^0.14.0",
diff --git a/yarn.lock b/yarn.lock
index cb76fdbdfb6..4e2dba2234c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2314,16 +2314,18 @@ atob@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.0.tgz#ab2b150e51d7b122b9efc8d7340c06b6c41076bc"
 
-autoprefixer@^7.0.0:
-  version "7.2.6"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-7.2.6.tgz#256672f86f7c735da849c4f07d008abb056067dc"
+autoprefixer@^9.0.2:
+  version "9.7.4"
+  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-9.7.4.tgz#f8bf3e06707d047f0641d87aee8cfb174b2a5378"
+  integrity sha512-g0Ya30YrMBAEZk60lp+qfX5YQllG+S5W3GYCFvyHTvhOki0AEQJLPEcIuGRsqVwLi8FvXPVtwTGhfr38hVpm0g==
   dependencies:
-    browserslist "^2.11.3"
-    caniuse-lite "^1.0.30000805"
+    browserslist "^4.8.3"
+    caniuse-lite "^1.0.30001020"
+    chalk "^2.4.2"
     normalize-range "^0.1.2"
     num2fraction "^1.2.2"
-    postcss "^6.0.17"
-    postcss-value-parser "^3.2.3"
+    postcss "^7.0.26"
+    postcss-value-parser "^4.0.2"
 
 aws-sign2@~0.6.0:
   version "0.6.0"
@@ -3379,13 +3381,14 @@ broccoli-asset-rewrite@^2.0.0:
   dependencies:
     broccoli-filter "^1.2.3"
 
-broccoli-autoprefixer@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/broccoli-autoprefixer/-/broccoli-autoprefixer-5.0.0.tgz#68c9f3bfdfff9df2d39e46545b9cf9d4443d6a16"
+broccoli-autoprefixer@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/broccoli-autoprefixer/-/broccoli-autoprefixer-7.0.0.tgz#19faef32922c50a34da7768dece9e3acff23d256"
+  integrity sha512-e0+jWK6/FIhdeXPQN5o43q/pMKHb8cCE5WE4HR3jHpluidK5y4h5KUeb1vp6vaCnbwg/zGrPTqU0UeJtMcZy0A==
   dependencies:
-    autoprefixer "^7.0.0"
+    autoprefixer "^9.0.2"
     broccoli-persistent-filter "^1.1.6"
-    postcss "^6.0.1"
+    postcss "^7.0.2"
 
 broccoli-babel-transpiler@^5.6.2:
   version "5.7.4"
@@ -4122,7 +4125,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@^2.11.3, browserslist@^3.2.6, browserslist@^4.0.0, browserslist@^4.5.6, browserslist@^4.8.3, browserslist@^4.8.5:
+browserslist@^3.2.6, browserslist@^4.0.0, browserslist@^4.5.6, browserslist@^4.8.3, browserslist@^4.8.5:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.6.0.tgz#5274028c26f4d933d5b1323307c1d1da5084c9ff"
   dependencies:
@@ -4375,7 +4378,7 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000805, caniuse-lite@^1.0.30000967:
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000967, caniuse-lite@^1.0.30001020:
   version "1.0.30001006"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001006.tgz#5b6e8288792cfa275f007b2819a00ccad7112655"
   integrity sha512-MXnUVX27aGs/QINz+QG1sWSLDr3P1A3Hq5EUWoIt0T7K24DuvMxZEnh3Y5aHlJW6Bz2aApJdSewdYLd8zQnUuw==
@@ -4429,7 +4432,7 @@ chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.3.2, chalk@^2.4.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   dependencies:
@@ -5781,12 +5784,13 @@ ember-cli-app-version@^3.2.0:
     ember-cli-babel "^6.12.0"
     git-repo-version "^1.0.2"
 
-ember-cli-autoprefixer@0.8.1:
-  version "0.8.1"
-  resolved "https://registry.yarnpkg.com/ember-cli-autoprefixer/-/ember-cli-autoprefixer-0.8.1.tgz#071dd9574451057b03dcc03b71f5bd9cb07ef332"
+ember-cli-autoprefixer@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ember-cli-autoprefixer/-/ember-cli-autoprefixer-1.0.0.tgz#8832fb08ceda9d41b7ff83594a133ae4132dd831"
+  integrity sha512-i1rOYZA1u5ZUbeDJXEUI0toH0gsOeVUWfI7vo03a8cHvHFhiLX+68Lmtou2oCTVe/EtuTA+iFE6Lbt/YJ16e5g==
   dependencies:
-    broccoli-autoprefixer "^5.0.0"
-    lodash "^4.0.0"
+    broccoli-autoprefixer "^7.0.0"
+    ember-cli-htmlbars "^4.2.2"
 
 ember-cli-babel-plugin-helpers@^1.0.0, ember-cli-babel-plugin-helpers@^1.1.0:
   version "1.1.0"
@@ -13070,17 +13074,19 @@ post-robot@^8.0.0, post-robot@^8.0.29:
     cross-domain-utils "^2.0.0"
     zalgo-promise "^1.0.3"
 
-postcss-value-parser@^3.2.3:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-3.3.0.tgz#87f38f9f18f774a4ab4c8a232f5c5ce8872a9d15"
+postcss-value-parser@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz#482282c09a42706d1fc9a069b73f44ec08391dc9"
+  integrity sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==
 
-postcss@^6.0.1, postcss@^6.0.17:
-  version "6.0.21"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.21.tgz#8265662694eddf9e9a5960db6da33c39e4cd069d"
+postcss@^7.0.2, postcss@^7.0.26:
+  version "7.0.26"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.26.tgz#5ed615cfcab35ba9bbb82414a4fa88ea10429587"
+  integrity sha512-IY4oRjpXWYshuTDFxMVkJDtWIk2LhsTlu8bZnbEJA4+bYT16Lvpo8Qv6EvDumhYRgzjZl489pmsY3qVgJQ08nA==
   dependencies:
-    chalk "^2.3.2"
+    chalk "^2.4.2"
     source-map "^0.6.1"
-    supports-color "^5.3.0"
+    supports-color "^6.1.0"
 
 postcss@^7.0.5:
   version "7.0.16"