diff --git a/preprocessing/package-lock.json b/preprocessing/package-lock.json
index dd39087..cb75d53 100644
--- a/preprocessing/package-lock.json
+++ b/preprocessing/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "d3-scale": "^3.2.1",
+        "d3-scale": "^4.0.2",
         "pako": "^1.0.11",
         "rimraf": "^3.0.0",
         "ssh2-sftp-client": "^5.1.2"
@@ -70,9 +70,15 @@
       }
     },
     "node_modules/d3-array": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-2.4.0.tgz",
-      "integrity": "sha512-KQ41bAF2BMakf/HdKT865ALd4cgND6VcIztVQZUTt0+BH3RWy6ZYnHghVXf6NFjt2ritLr8H1T8LreAAlfiNcw=="
+      "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==",
+      "dependencies": {
+        "internmap": "1 - 2"
+      },
+      "engines": {
+        "node": ">=12"
+      }
     },
     "node_modules/d3-color": {
       "version": "1.4.1",
@@ -93,15 +99,29 @@
       }
     },
     "node_modules/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==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/d3-scale/-/d3-scale-4.0.2.tgz",
+      "integrity": "sha512-GZW464g1SH7ag3Y7hXjf8RoUuAFIqklOAq3MRl4OaWabTFJY9PN/E1YklhXLh+OQ3fM9yS2nOkCoS+WLZ6kvxQ==",
       "dependencies": {
-        "d3-array": "1.2.0 - 2",
-        "d3-format": "1",
-        "d3-interpolate": "^1.2.0",
-        "d3-time": "1",
-        "d3-time-format": "2"
+        "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"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-scale/node_modules/d3-time": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-time/-/d3-time-3.0.0.tgz",
+      "integrity": "sha512-zmV3lRnlaLI08y9IMRXSDshQb5Nj77smnfpnd2LrBa/2K281Jijactokeak14QacHs/kKq0AQ121nidNYlarbQ==",
+      "dependencies": {
+        "d3-array": "2 - 3"
+      },
+      "engines": {
+        "node": ">=12"
       }
     },
     "node_modules/d3-time": {
@@ -152,6 +172,14 @@
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
       "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
     },
+    "node_modules/internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg==",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
@@ -350,9 +378,12 @@
       }
     },
     "d3-array": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-2.4.0.tgz",
-      "integrity": "sha512-KQ41bAF2BMakf/HdKT865ALd4cgND6VcIztVQZUTt0+BH3RWy6ZYnHghVXf6NFjt2ritLr8H1T8LreAAlfiNcw=="
+      "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-color": {
       "version": "1.4.1",
@@ -373,15 +404,25 @@
       }
     },
     "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==",
+      "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": "1.2.0 - 2",
-        "d3-format": "1",
-        "d3-interpolate": "^1.2.0",
-        "d3-time": "1",
-        "d3-time-format": "2"
+        "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-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-time": {
@@ -429,6 +470,11 @@
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
       "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
     },
+    "internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg=="
+    },
     "minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
diff --git a/preprocessing/package.json b/preprocessing/package.json
index 766fbbf..cfa6c89 100644
--- a/preprocessing/package.json
+++ b/preprocessing/package.json
@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "d3-scale": "^3.2.1",
+    "d3-scale": "^4.0.2",
     "pako": "^1.0.11",
     "rimraf": "^3.0.0",
     "ssh2-sftp-client": "^5.1.2"