diff --git a/client_src/css/main.css b/client_src/css/main.css
index dbc4469..16260f6 100644
--- a/client_src/css/main.css
+++ b/client_src/css/main.css
@@ -5,6 +5,12 @@
 @import "../../node_modules/leaflet.markercluster/dist/MarkerCluster.css";
 @import "../../node_modules/leaflet.markercluster/dist/MarkerCluster.Default.css";
 
+/** Ensure that some assets are copied that aren't by default **/
+.non-existent {
+    background: url(../../node_modules/leaflet/dist/images/marker-icon-2x.png),
+        url(../../node_modules/leaflet/dist/images/marker-shadow.png);
+}
+
 html, body { font-size: 100%; }
 body {
     display: grid;
diff --git a/package-lock.json b/package-lock.json
index c11cbcd..ea9ed01 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -296,24 +296,6 @@
       "integrity": "sha512-+hN/Zh2D08Mx65pZ/4g5bsmNiZUuChDiQfTUQ7qJr4/kuopCr88xZsAXv6mBoZEsUI4OuGHlX59qE94K2mMW8Q==",
       "dev": true
     },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-          "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-          "dev": true
-        }
-      }
-    },
     "braces": {
       "version": "1.8.5",
       "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
@@ -543,12 +525,6 @@
       "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
       "dev": true
     },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-      "dev": true
-    },
     "concat-with-sourcemaps": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/concat-with-sourcemaps/-/concat-with-sourcemaps-1.1.0.tgz",
@@ -836,12 +812,6 @@
         }
       }
     },
-    "cuint": {
-      "version": "0.2.2",
-      "resolved": "https://registry.npmjs.org/cuint/-/cuint-0.2.2.tgz",
-      "integrity": "sha1-QICG1AlVDCYxFVYZ6fp7ytw7mRs=",
-      "dev": true
-    },
     "debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -1699,21 +1669,6 @@
         "regex-cache": "^0.4.2"
       }
     },
-    "mime": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.0.tgz",
-      "integrity": "sha512-ikBcWwyqXQSHKtciCcctu9YfPbFYZ4+gbHEmE0Q8jzcTYQg5dHCr3g2wwAZjPoJfQVXZq6KXAjpXOTf5/cjT7w==",
-      "dev": true
-    },
-    "minimatch": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
-      "dev": true,
-      "requires": {
-        "brace-expansion": "^1.1.7"
-      }
-    },
     "minimist": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
@@ -4090,41 +4045,6 @@
         }
       }
     },
-    "postcss-url": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/postcss-url/-/postcss-url-8.0.0.tgz",
-      "integrity": "sha512-E2cbOQ5aii2zNHh8F6fk1cxls7QVFZjLPSrqvmiza8OuXLzIpErij8BDS5Y3STPfJgpIMNCPEr8JlKQWEoozUw==",
-      "dev": true,
-      "requires": {
-        "mime": "^2.3.1",
-        "minimatch": "^3.0.4",
-        "mkdirp": "^0.5.0",
-        "postcss": "^7.0.2",
-        "xxhashjs": "^0.2.1"
-      },
-      "dependencies": {
-        "postcss": {
-          "version": "7.0.13",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.13.tgz",
-          "integrity": "sha512-h8SY6kQTd1wISHWjz+E6cswdhMuyBZRb16pSTv3W4zYZ3/YbyWeJdNUeOXB5IdZqE1U76OUEjjjqsC3z2f3hVg==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.2",
-            "source-map": "^0.6.1",
-            "supports-color": "^6.1.0"
-          }
-        },
-        "supports-color": {
-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-          "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
-      }
-    },
     "postcss-value-parser": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz",
@@ -5020,15 +4940,6 @@
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
       "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
       "dev": true
-    },
-    "xxhashjs": {
-      "version": "0.2.2",
-      "resolved": "https://registry.npmjs.org/xxhashjs/-/xxhashjs-0.2.2.tgz",
-      "integrity": "sha512-AkTuIuVTET12tpsVIQo+ZU6f/qDmKuRUcjaqR+OIvm+aCBsZ95i7UVY5WJ9TMsSaZ0DA2WxoZ4acu0sPH+OKAw==",
-      "dev": true,
-      "requires": {
-        "cuint": "^0.2.2"
-      }
     }
   }
 }
diff --git a/package.json b/package.json
index df4289b..a6d929f 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
     "leaflet-heatmap": "^1.0.0",
     "postcss-copy": "^7.1.0",
     "postcss-import": "^12.0.1",
-    "postcss-url": "^8.0.0",
     "rollup": "^1.1.0",
     "rollup-plugin-commonjs": "^9.2.0",
     "rollup-plugin-node-resolve": "^4.0.0",
diff --git a/rollup.config.js b/rollup.config.js
index 85d5ba7..bd36398 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -7,7 +7,6 @@ import postcss from 'rollup-plugin-postcss';
 import { terser } from "rollup-plugin-terser";
 
 import postcss_import from 'postcss-import';
-import postcss_url from 'postcss-url';
 import postcss_copy from 'postcss-copy';
 
 export default {