diff --git a/csfieldguide/package-lock.json b/csfieldguide/package-lock.json
index c9638daa4..c24ae99d0 100644
--- a/csfieldguide/package-lock.json
+++ b/csfieldguide/package-lock.json
@@ -39,7 +39,7 @@
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+                "postcss": "8.5.3",
                 "postcss-flexbugs-fixes": "5.0.2",
                 "sass": "1.85.0",
                 "vinyl-buffer": "1.0.1",
@@ -10924,9 +10924,9 @@
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-            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.2.tgz",
-            "integrity": "sha512-MjOadfU3Ys9KYoX0AdkBlFEF1Vx37uCCeN4ZHnmwm9FfpbsGWMZeBLMmmpY+6Ocqod7mkdZ0DT31OlbsFrLlkA==",
+            "version": "8.5.3",
+            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.3.tgz",
+            "integrity": "sha512-dle9A3yYxlBSrt8Fu+IpjGT8SY8hN0mlaA6GY8t0P5PjIOZemULz/E2Bnm/2dcUOena75OTNkHI76uZBNUUq3A==",
             "dev": true,
             "funding": [
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@@ -23071,9 +23071,9 @@
             "dev": true
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-            "version": "8.5.2",
-            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.2.tgz",
-            "integrity": "sha512-MjOadfU3Ys9KYoX0AdkBlFEF1Vx37uCCeN4ZHnmwm9FfpbsGWMZeBLMmmpY+6Ocqod7mkdZ0DT31OlbsFrLlkA==",
+            "version": "8.5.3",
+            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.3.tgz",
+            "integrity": "sha512-dle9A3yYxlBSrt8Fu+IpjGT8SY8hN0mlaA6GY8t0P5PjIOZemULz/E2Bnm/2dcUOena75OTNkHI76uZBNUUq3A==",
             "dev": true,
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diff --git a/csfieldguide/package.json b/csfieldguide/package.json
index a7dda63f5..0f306554c 100644
--- a/csfieldguide/package.json
+++ b/csfieldguide/package.json
@@ -35,7 +35,7 @@
         "multiple-select": "1.7.0",
         "pixrem": "5.0.0",
         "popper.js": "1.16.1",
-        "postcss": "8.5.2",
+        "postcss": "8.5.3",
         "postcss-flexbugs-fixes": "5.0.2",
         "sass": "1.85.0",
         "vinyl-buffer": "1.0.1",