diff --git a/package-lock.json b/package-lock.json
index 1b3abf7..60cb909 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "leaflet.heightgraph",
-  "version": "1.3.2",
+  "version": "1.3.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -4614,9 +4614,9 @@
       }
     },
     "postcss": {
-      "version": "7.0.32",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.32.tgz",
-      "integrity": "sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==",
+      "version": "7.0.36",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz",
+      "integrity": "sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==",
       "dev": true,
       "requires": {
         "chalk": "^2.4.2",