diff --git a/package.json b/package.json
index f9535ea24..06ac07199 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "mkdirp": "^0.5.1",
     "null-loader": "^3.0.0",
     "opn-cli": "^5.0.0",
-    "pixrem": "^4.0.1",
+    "pixrem": "^5.0.0",
     "pleeease-filters": "^4.0.0",
     "postcss": "^7.0.2",
     "postcss-calc": "^6.0.1",
diff --git a/yarn.lock b/yarn.lock
index 6d967a750..1dd7e5d5f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1851,11 +1851,6 @@ bail@^1.0.0:
   resolved "https://registry.yarnpkg.com/bail/-/bail-1.0.4.tgz#7181b66d508aa3055d3f6c13f0a0c720641dde9b"
   integrity sha512-S8vuDB4w6YpRhICUDET3guPlQpaJl7od94tpZ0Fvnyp+MKW/HyDTcRDck+29C9g+d/qQHnddRH3+94kZdrW0Ww==
 
-balanced-match@^0.4.2:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
-  integrity sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=
-
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
@@ -2134,15 +2129,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@^2.0.0:
-  version "2.11.3"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.11.3.tgz#fe36167aed1bbcde4827ebfe71347a2cc70b99b2"
-  integrity sha512-yWu5cXT7Av6mVwzWc8lMsJMHWn4xyjSuGYi4IozbVTLUOEYPSagUB8kiMDUHA1fS3zjr8nkxkn9jdvug4BBRmA==
-  dependencies:
-    caniuse-lite "^1.0.30000792"
-    electron-to-chromium "^1.3.30"
-
-browserslist@^4.0.0, browserslist@^4.6.0, browserslist@^4.6.4, browserslist@^4.7.2:
+browserslist@^4.0.0, browserslist@^4.3.6, browserslist@^4.6.0, browserslist@^4.6.4, 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==
@@ -2306,7 +2293,7 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000792, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001004, caniuse-lite@^1.0.30001006:
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, 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==
@@ -3418,7 +3405,7 @@ ejs@^2.6.1:
   resolved "https://registry.yarnpkg.com/ejs/-/ejs-2.7.1.tgz#5b5ab57f718b79d4aca9254457afecd36fa80228"
   integrity sha512-kS/gEPzZs3Y1rRsbGX4UOSjtP/CeJP0CxSNZHYxGfVM/VgLcv0ZqM7C45YyTj2DI2g7+P9Dd24C+IMIg6D0nYQ==
 
-electron-to-chromium@^1.3.295, electron-to-chromium@^1.3.30:
+electron-to-chromium@^1.3.295:
   version "1.3.302"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.302.tgz#4c7ba3d56166507a56f7eb603fdde1ed701f5ac8"
   integrity sha512-1qConyiVEbj4xZRBXqtGR003+9tV0rJF0PS6aeO0Ln/UL637js9hdwweCl07meh/kJoI2N4W8q3R3g3F5z46ww==
@@ -6651,11 +6638,6 @@ markdown-table@^1.1.0:
   resolved "https://registry.yarnpkg.com/markdown-table/-/markdown-table-1.1.3.tgz#9fcb69bcfdb8717bfd0398c6ec2d93036ef8de60"
   integrity sha512-1RUZVgQlpJSPWYbFSpmudq5nHY1doEIv89gBtF0s4gW1GF2XorxcA/70M5vq7rLv0a6mhOUccRsqkwhwLCIQ2Q==
 
-math-expression-evaluator@^1.2.14:
-  version "1.2.17"
-  resolved "https://registry.yarnpkg.com/math-expression-evaluator/-/math-expression-evaluator-1.2.17.tgz#de819fdbcd84dccd8fae59c6aeb79615b9d266ac"
-  integrity sha1-3oGf282E3M2PrlnGrreWFbnSZqw=
-
 mathml-tag-names@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/mathml-tag-names/-/mathml-tag-names-2.1.1.tgz#6dff66c99d55ecf739ca53c492e626f1d12a33cc"
@@ -7872,14 +7854,14 @@ pirates@^4.0.0, pirates@^4.0.1:
   dependencies:
     node-modules-regexp "^1.0.0"
 
-pixrem@^4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/pixrem/-/pixrem-4.0.1.tgz#2da4a1de6ec4423c5fc3794e930b81d4490ec686"
-  integrity sha1-LaSh3m7EQjxfw3lOkwuB1EkOxoY=
+pixrem@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/pixrem/-/pixrem-5.0.0.tgz#460c534fbc19e4e9fbf39012ae26c7107cd40bca"
+  integrity sha512-ugJ4Imy92u55zeznaN/5d7iqOBIZjZ7q10/T+dcd0IuFtbLlsGDvAUabFu1cafER+G9f0T1WtTqvzm4KAdcDgQ==
   dependencies:
-    browserslist "^2.0.0"
-    postcss "^6.0.0"
-    reduce-css-calc "^1.2.7"
+    browserslist "^4.3.6"
+    postcss "^7.0.7"
+    reduce-css-calc "^2.1.5"
 
 pkg-dir@^1.0.0:
   version "1.0.0"
@@ -9180,16 +9162,7 @@ redent@^2.0.0:
     indent-string "^3.0.0"
     strip-indent "^2.0.0"
 
-reduce-css-calc@^1.2.7:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/reduce-css-calc/-/reduce-css-calc-1.3.0.tgz#747c914e049614a4c9cfbba629871ad1d2927716"
-  integrity sha1-dHyRTgSWFKTJz7umKYca0dKSdxY=
-  dependencies:
-    balanced-match "^0.4.2"
-    math-expression-evaluator "^1.2.14"
-    reduce-function-call "^1.0.1"
-
-reduce-css-calc@^2.0.0:
+reduce-css-calc@^2.0.0, reduce-css-calc@^2.1.5:
   version "2.1.7"
   resolved "https://registry.yarnpkg.com/reduce-css-calc/-/reduce-css-calc-2.1.7.tgz#1ace2e02c286d78abcd01fd92bfe8097ab0602c2"
   integrity sha512-fDnlZ+AybAS3C7Q9xDq5y8A2z+lT63zLbynew/lur/IR24OQF5x98tfNwf79mzEdfywZ0a2wpM860FhFfMxZlA==
@@ -9197,13 +9170,6 @@ reduce-css-calc@^2.0.0:
     css-unit-converter "^1.1.1"
     postcss-value-parser "^3.3.0"
 
-reduce-function-call@^1.0.1:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/reduce-function-call/-/reduce-function-call-1.0.3.tgz#60350f7fb252c0a67eb10fd4694d16909971300f"
-  integrity sha512-Hl/tuV2VDgWgCSEeWMLwxLZqX7OK59eU1guxXsRKTAyeYimivsKdtcV4fu3r710tpG5GmDKDhQ0HSZLExnNmyQ==
-  dependencies:
-    balanced-match "^1.0.0"
-
 regenerate-unicode-properties@^8.1.0:
   version "8.1.0"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-8.1.0.tgz#ef51e0f0ea4ad424b77bf7cb41f3e015c70a3f0e"