diff --git a/package-lock.json b/package-lock.json
index 32c1873a..987968ec 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -452,16 +452,64 @@
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@@ -487,7 +535,7 @@
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@@ -1634,12 +1682,12 @@
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-      "integrity": "sha1-5x9cYeH5bHo69OeRrF21XhFzdgQ="
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@@ -2547,12 +2595,25 @@
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-          "integrity": "sha1-BuHqgILCyxTjmAbiLi9vdX+Srzk="
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@@ -4098,15 +4162,18 @@
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@@ -4209,7 +4276,8 @@
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@@ -4219,6 +4287,7 @@
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@@ -4231,17 +4300,20 @@
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@@ -4258,6 +4330,7 @@
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@@ -4336,7 +4409,8 @@
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@@ -4346,6 +4420,7 @@
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@@ -4421,7 +4496,8 @@
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@@ -4468,6 +4545,7 @@
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@@ -4506,11 +4584,13 @@
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@@ -6393,9 +6473,9 @@
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@@ -6790,22 +6870,118 @@
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@@ -6848,430 +7024,1672 @@
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+          "integrity": "sha512-eVRqCvVlZbuw3GrM63ovNSNAeA1K16kaR/LRY/92w0zxQ5/1YzwblUX652i4Xs9RwAGjW9d9y6X88t8OaAJfWQ=="
+        }
+      }
+    },
     "sinon": {
       "version": "7.2.2",
       "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.2.2.tgz",
diff --git a/package.json b/package.json
index baebf71b..67dca42e 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "pg": "^7.8.0",
     "pg-hstore": "^2.3.1",
     "postcss": "^5.2.18",
-    "postcss-cssnext": "^2.9.0",
+    "postcss-cssnext": "^3.1.0",
     "postcss-middleware": "^1.1.4",
     "prettier": "^1.15.3",
     "prop-types": "^15.6.2",