diff --git a/package-lock.json b/package-lock.json
index 7a148b0..7244e0d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1628,9 +1628,9 @@
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     },
     "d3-color": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-1.4.1.tgz",
-      "integrity": "sha512-p2sTHSLCJI2QKunbGb7ocOh7DgTAn8IrLx21QRc/BSnodXM4sv6aLQlnfpvehFMLZEfBc6g9pH9SWQccFYfJ9Q=="
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-3.1.0.tgz",
+      "integrity": "sha512-zg/chbXyeBtMQ1LbD/WSoW2DpC3I0mpmPdW+ynRTj/x2DAWYrIY7qeZIHidozwV24m4iavr15lNwIwLxRmOxhA=="
     },
     "d3-dispatch": {
       "version": "1.0.6",
@@ -1647,28 +1647,46 @@
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     },
     "d3-format": {
-      "version": "1.4.4",
-      "resolved": "https://registry.npmjs.org/d3-format/-/d3-format-1.4.4.tgz",
-      "integrity": "sha512-TWks25e7t8/cqctxCmxpUuzZN11QxIA7YrMbram94zMQ0PXjE4LVIMe/f6a4+xxL8HQ3OsAFULOINQi1pE62Aw=="
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-format/-/d3-format-3.1.0.tgz",
+      "integrity": "sha512-YyUI6AEuY/Wpt8KWLgZHsIU86atmikuoOmCfommt0LYHiQSPjvX2AcFc38PX0CBpr2RCyZhjex+NS/LPOv6YqA=="
     },
     "d3-interpolate": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/d3-interpolate/-/d3-interpolate-1.4.0.tgz",
-      "integrity": "sha512-V9znK0zc3jOPV4VD2zZn0sDhZU3WAE2bmlxdIwwQPPzPjvyLkd8B3JUVdS1IDUFDkWZ72c9qnv1GK2ZagTZ8EA==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-interpolate/-/d3-interpolate-3.0.1.tgz",
+      "integrity": "sha512-3bYs1rOD33uo8aqJfKP3JWPAibgw8Zm2+L9vBKEHJ2Rg+viTR7o5Mmv5mZcieN+FRYaAOWX5SJATX6k1PWz72g==",
       "requires": {
-        "d3-color": "1"
+        "d3-color": "1 - 3"
       }
     },
     "d3-scale": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/d3-scale/-/d3-scale-3.2.1.tgz",
-      "integrity": "sha512-huz5byJO/6MPpz6Q8d4lg7GgSpTjIZW/l+1MQkzKfu2u8P6hjaXaStOpmyrD6ymKoW87d2QVFCKvSjLwjzx/rA==",
-      "requires": {
-        "d3-array": "1.2.0 - 2",
-        "d3-format": "1",
-        "d3-interpolate": "^1.2.0",
-        "d3-time": "1",
-        "d3-time-format": "2"
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/d3-scale/-/d3-scale-4.0.2.tgz",
+      "integrity": "sha512-GZW464g1SH7ag3Y7hXjf8RoUuAFIqklOAq3MRl4OaWabTFJY9PN/E1YklhXLh+OQ3fM9yS2nOkCoS+WLZ6kvxQ==",
+      "requires": {
+        "d3-array": "2.10.0 - 3",
+        "d3-format": "1 - 3",
+        "d3-interpolate": "1.2.0 - 3",
+        "d3-time": "2.1.1 - 3",
+        "d3-time-format": "2 - 4"
+      },
+      "dependencies": {
+        "d3-array": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-3.2.0.tgz",
+          "integrity": "sha512-3yXFQo0oG3QCxbF06rMPFyGRMGJNS7NvsV1+2joOjbBE+9xvWQ8+GcMJAjRCzw06zQ3/arXeJgbPYcjUCuC+3g==",
+          "requires": {
+            "internmap": "1 - 2"
+          }
+        },
+        "d3-time": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/d3-time/-/d3-time-3.0.0.tgz",
+          "integrity": "sha512-zmV3lRnlaLI08y9IMRXSDshQb5Nj77smnfpnd2LrBa/2K281Jijactokeak14QacHs/kKq0AQ121nidNYlarbQ==",
+          "requires": {
+            "d3-array": "2 - 3"
+          }
+        }
       }
     },
     "d3-selection": {
@@ -2636,6 +2654,11 @@
         }
       }
     },
+    "internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg=="
+    },
     "intersection-observer": {
       "version": "0.4.3",
       "resolved": "https://registry.npmjs.org/intersection-observer/-/intersection-observer-0.4.3.tgz",
diff --git a/package.json b/package.json
index a365955..d44e0bd 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "commander": "^2.20.3",
     "d3-array": "^2.4.0",
     "d3-drag": "^1.2.5",
-    "d3-scale": "^3.2.1",
+    "d3-scale": "^4.0.2",
     "d3-selection": "^1.4.1",
     "d3-time-format": "^2.2.3",
     "escape-html": "^1.0.3",