diff --git a/package.json b/package.json
index 9c15728..f13cc60 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "jest": "25.1.0",
     "jest-cli": "25.1.0",
     "lost": "8.3.1",
-    "postcss-pxtorem": "4.0.1",
+    "postcss-pxtorem": "5.1.1",
     "react-test-renderer": "16.13.0",
     "rimraf": "3.0.2",
     "stylelint": "13.2.0",
diff --git a/yarn.lock b/yarn.lock
index b3b4d8e..b39a820 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8738,10 +8738,6 @@ has-cors@1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/has-cors/-/has-cors-1.1.0.tgz#5e474793f7ea9843d1bb99c23eef49ff126fff39"
 
-has-flag@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
-
 has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
@@ -10547,7 +10543,7 @@ jpeg-js@^0.3.4:
   version "0.3.5"
   resolved "https://registry.yarnpkg.com/jpeg-js/-/jpeg-js-0.3.5.tgz#6fbd6cd0e49627c5a0341796c9e50c70a2aa3673"
 
-js-base64@^2.1.8, js-base64@^2.1.9, js-base64@^2.5.1:
+js-base64@^2.1.8, js-base64@^2.5.1:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.1.tgz#1efa39ef2c5f7980bb1784ade4a8af2de3291121"
 
@@ -13580,12 +13576,12 @@ postcss-ordered-values@^4.1.2:
     postcss "^7.0.0"
     postcss-value-parser "^3.0.0"
 
-postcss-pxtorem@4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/postcss-pxtorem/-/postcss-pxtorem-4.0.1.tgz#9c64d0efe4885473cc1cb0305c6ffc3ebb45b1cd"
+postcss-pxtorem@5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/postcss-pxtorem/-/postcss-pxtorem-5.1.1.tgz#198a68c10f9ad2d42370ef66299d7b3168f8cffa"
+  integrity sha512-uvgIujL/pn0GbZ+rczESD2orHsbXrrCqi+q9wJO8PCk3ZGCoVVtu5hZTbtk+tbZHZP5UkTfCvqOrTZs9Ncqfsg==
   dependencies:
-    object-assign "^4.1.0"
-    postcss "^5.2.10"
+    postcss "^7.0.27"
 
 postcss-reduce-initial@^4.0.3:
   version "4.0.3"
@@ -13700,15 +13696,6 @@ postcss@7.0.14:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@^5.2.10:
-  version "5.2.18"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.2.18.tgz#badfa1497d46244f6390f58b319830d9107853c5"
-  dependencies:
-    chalk "^1.1.3"
-    js-base64 "^2.1.9"
-    source-map "^0.5.6"
-    supports-color "^3.2.3"
-
 postcss@^6.0.0, postcss@^6.0.1, postcss@^6.0.23:
   version "6.0.23"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
@@ -13752,6 +13739,15 @@ postcss@^7.0.26:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+postcss@^7.0.27:
+  version "7.0.27"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.27.tgz#cc67cdc6b0daa375105b7c424a85567345fc54d9"
+  integrity sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==
+  dependencies:
+    chalk "^2.4.2"
+    source-map "^0.6.1"
+    supports-color "^6.1.0"
+
 potrace@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/potrace/-/potrace-2.1.2.tgz#61473a326be1e734abac6d14d54e1880eed35471"
@@ -16548,12 +16544,6 @@ supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
 
-supports-color@^3.2.3:
-  version "3.2.3"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.2.3.tgz#65ac0504b3954171d8a64946b2ae3cbb8a5f54f6"
-  dependencies:
-    has-flag "^1.0.0"
-
 supports-color@^5.3.0, supports-color@^5.4.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"