diff --git a/package.json b/package.json
index b071ad6..79ffd3a 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "contributors": "https://github.com/TryGhost/Casper/graphs/contributors",
     "devDependencies": {
         "@tryghost/release-utils": "0.3.3",
-        "autoprefixer": "9.6.5",
+        "autoprefixer": "9.7.1",
         "beeper": "2.0.0",
         "cssnano": "4.1.10",
         "gscan": "3.0.0",
diff --git a/yarn.lock b/yarn.lock
index aa963c0..ecf11ef 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -285,17 +285,17 @@ atob@^2.1.1:
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
   integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
 
-autoprefixer@9.6.5:
-  version "9.6.5"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-9.6.5.tgz#98f4afe7e93cccf323287515d426019619775e5e"
-  integrity sha512-rGd50YV8LgwFQ2WQp4XzOTG69u1qQsXn0amww7tjqV5jJuNazgFKYEVItEBngyyvVITKOg20zr2V+9VsrXJQ2g==
+autoprefixer@9.7.1:
+  version "9.7.1"
+  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-9.7.1.tgz#9ffc44c55f5ca89253d9bb7186cefb01ef57747f"
+  integrity sha512-w3b5y1PXWlhYulevrTJ0lizkQ5CyqfeU6BIRDbuhsMupstHQOeb1Ur80tcB1zxSu7AwyY/qCQ7Vvqklh31ZBFw==
   dependencies:
-    browserslist "^4.7.0"
-    caniuse-lite "^1.0.30000999"
+    browserslist "^4.7.2"
+    caniuse-lite "^1.0.30001006"
     chalk "^2.4.2"
     normalize-range "^0.1.2"
     num2fraction "^1.2.2"
-    postcss "^7.0.18"
+    postcss "^7.0.21"
     postcss-value-parser "^4.0.2"
 
 aws-sign2@~0.7.0:
@@ -425,7 +425,7 @@ braces@^2.3.1, braces@^2.3.2:
     split-string "^3.0.2"
     to-regex "^3.0.1"
 
-browserslist@^4.0.0, browserslist@^4.7.0:
+browserslist@^4.0.0:
   version "4.7.1"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.7.1.tgz#bd400d1aea56538580e8c4d5f1c54ac11b5ab468"
   integrity sha512-QtULFqKIAtiyNx7NhZ/p4rB8m3xDozVo/pi5VgTlADLF2tNigz/QH+v0m5qhn7XfHT7u+607NcCNOnC0HZAlMg==
@@ -434,6 +434,15 @@ browserslist@^4.0.0, browserslist@^4.7.0:
     electron-to-chromium "^1.3.284"
     node-releases "^1.1.36"
 
+browserslist@^4.7.2:
+  version "4.7.2"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.7.2.tgz#1bb984531a476b5d389cedecb195b2cd69fb1348"
+  integrity sha512-uZavT/gZXJd2UTi9Ov7/Z340WOSQ3+m1iBVRUknf+okKxonL9P83S3ctiBDtuRmRu8PiCHjqyueqQ9HYlJhxiw==
+  dependencies:
+    caniuse-lite "^1.0.30001004"
+    electron-to-chromium "^1.3.295"
+    node-releases "^1.1.38"
+
 buffer-crc32@~0.2.3:
   version "0.2.13"
   resolved "https://registry.yarnpkg.com/buffer-crc32/-/buffer-crc32-0.2.13.tgz#0d333e3f00eac50aa1454abd30ef8c2a5d9a7242"
@@ -549,6 +558,11 @@ caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000999:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000999.tgz#427253a69ad7bea4aa8d8345687b8eec51ca0e43"
   integrity sha512-1CUyKyecPeksKwXZvYw0tEoaMCo/RwBlXmEtN5vVnabvO0KPd9RQLcaAuR9/1F+KDMv6esmOFWlsXuzDk+8rxg==
 
+caniuse-lite@^1.0.30001004, caniuse-lite@^1.0.30001006:
+  version "1.0.30001006"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001006.tgz#5b6e8288792cfa275f007b2819a00ccad7112655"
+  integrity sha512-MXnUVX27aGs/QINz+QG1sWSLDr3P1A3Hq5EUWoIt0T7K24DuvMxZEnh3Y5aHlJW6Bz2aApJdSewdYLd8zQnUuw==
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -1230,6 +1244,11 @@ electron-to-chromium@^1.3.284:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.287.tgz#4aabb331e4eaa45c6af2730d32f57a0ae6c42b4c"
   integrity sha512-0XlYcw6fJQ5Vh735iYJTMHysTMYjCwBFdOtyxhGbE3I9MQ2Wk2WXYIXjY1w8votvzh0fsQRaSVJ/bKUj073E9w==
 
+electron-to-chromium@^1.3.295:
+  version "1.3.297"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.297.tgz#e28621c1b36c0c4556fdc70b4f4a7fe16a1866e3"
+  integrity sha512-Q5BHIOJcWhDIz5FmVGv991O0LM0iWtfmGt1L3av+mmpIbIzmv4IWYpHhJcFoCdmbO8up0KqtvYUrH1vlbUP2Eg==
+
 emoji-regex@^8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-8.0.0.tgz#e818fd69ce5ccfcb404594f842963bf53164cc37"
@@ -3005,6 +3024,13 @@ node-releases@^1.1.36:
   dependencies:
     semver "^6.3.0"
 
+node-releases@^1.1.38:
+  version "1.1.39"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.39.tgz#c1011f30343aff5b633153b10ff691d278d08e8d"
+  integrity sha512-8MRC/ErwNCHOlAFycy9OPca46fQYUjbJRDcZTHVWIGXIjYLM73k70vv3WkYutVnM4cCo4hE0MqBVVZjP6vjISA==
+  dependencies:
+    semver "^6.3.0"
+
 nopt@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-4.0.1.tgz#d0d4685afd5415193c8c7505602d0d17cd64474d"
@@ -3763,7 +3789,7 @@ postcss@^6.0.1, postcss@^6.0.11, postcss@^6.0.23:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.17, postcss@^7.0.18, postcss@^7.0.2, postcss@^7.0.5:
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.5:
   version "7.0.18"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.18.tgz#4b9cda95ae6c069c67a4d933029eddd4838ac233"
   integrity sha512-/7g1QXXgegpF+9GJj4iN7ChGF40sYuGYJ8WZu8DZWnmhQ/G36hfdk3q9LBJmoK+lZ+yzZ5KYpOoxq7LF1BxE8g==
@@ -3772,6 +3798,15 @@ postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.17, postcss@^7.0.18, postcss@^7.0.2
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+postcss@^7.0.21:
+  version "7.0.21"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.21.tgz#06bb07824c19c2021c5d056d5b10c35b989f7e17"
+  integrity sha512-uIFtJElxJo29QC753JzhidoAhvp/e/Exezkdhfmt8AymWT6/5B7W1WmponYWkHk2eg6sONyTch0A3nkMPun3SQ==
+  dependencies:
+    chalk "^2.4.2"
+    source-map "^0.6.1"
+    supports-color "^6.1.0"
+
 pretty-hrtime@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz#b7e3ea42435a4c9b2759d99e0f201eb195802ee1"