diff --git a/package-lock.json b/package-lock.json
index cab55cacbf199d..7cceb1e487570f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14348,6 +14348,7 @@
 				"mini-css-extract-plugin": "^1.3.9",
 				"minimist": "^1.2.0",
 				"npm-package-json-lint": "^5.0.0",
+				"postcss": "^8.2.2",
 				"postcss-loader": "^4.2.0",
 				"prettier": "npm:wp-prettier@2.2.1-beta-1",
 				"puppeteer-core": "^9.0.0",
diff --git a/packages/scripts/CHANGELOG.md b/packages/scripts/CHANGELOG.md
index 8f9a0077511dc8..7dcf7e65c79ced 100644
--- a/packages/scripts/CHANGELOG.md
+++ b/packages/scripts/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Bug Fix
+
+-   Add `postcss` as a dependency to ensure that the correct version gets installed.
+
 ## 15.0.0 (2021-04-29)
 
 ### Breaking Changes
diff --git a/packages/scripts/package.json b/packages/scripts/package.json
index 543fa35b7be001..16b7ac9d3d11b0 100644
--- a/packages/scripts/package.json
+++ b/packages/scripts/package.json
@@ -66,6 +66,7 @@
 		"mini-css-extract-plugin": "^1.3.9",
 		"minimist": "^1.2.0",
 		"npm-package-json-lint": "^5.0.0",
+		"postcss": "^8.2.2",
 		"postcss-loader": "^4.2.0",
 		"prettier": "npm:wp-prettier@2.2.1-beta-1",
 		"puppeteer-core": "^9.0.0",