diff --git a/package-lock.json b/package-lock.json
index aeb3697..91cc760 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1798,60 +1798,66 @@
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-        "d3-time": "1",
-        "d3-time-format": "2"
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+        "d3-format": "1 - 3",
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-        "d3-color": "1",
-        "d3-interpolate": "1"
+        "d3-color": "1 - 3",
+        "d3-interpolate": "1 - 3"
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-      "resolved": "https://registry.npmjs.org/d3-time/-/d3-time-1.0.11.tgz",
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+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/d3-time-format/-/d3-time-format-4.1.0.tgz",
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       "requires": {
-        "d3-time": "1"
+        "d3-time": "1 - 3"
       }
     },
     "date-now": {
@@ -3388,6 +3394,11 @@
         "ipaddr.js": "^1.9.0"
       }
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+    "internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg=="
+    },
     "interpret": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/interpret/-/interpret-1.2.0.tgz",
diff --git a/package.json b/package.json
index 28bba3f..65bb8ba 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,8 @@
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     "@babel/preset-env": "^7.5.5",
     "babel-loader": "^8.0.6",
-    "d3-scale": "^3.0.0",
-    "d3-scale-chromatic": "^1.3.3",
+    "d3-scale": "^4.0.2",
+    "d3-scale-chromatic": "^3.0.0",
     "lodash": "^4.17.14",
     "normalize.css": "^8.0.1",
     "topojson": "^3.0.2",