diff --git a/package-lock.json b/package-lock.json
index c775a36..6519fc6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,12 +13,12 @@
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-        "@types/proj4": "^2.5.2",
         "deep-diff-pizza": "^1.0.2",
         "eslint": "^9.16.0",
         "eslint-config-openlayers": "^20.0.0",
         "fs-extra": "^11.1.0",
-        "jsdoc": "^4.0.2"
+        "jsdoc": "^4.0.2",
+        "proj4": "^2.19.7"
       }
     },
     "node_modules/@babel/parser": {
@@ -313,12 +313,6 @@
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       "dev": true
     },
-    "node_modules/@types/proj4": {
-      "version": "2.5.6",
-      "resolved": "https://registry.npmjs.org/@types/proj4/-/proj4-2.5.6.tgz",
-      "integrity": "sha512-zfMrPy9fx+8DchqM0kIUGeu2tTVB5ApO1KGAYcSGFS8GoqRIkyL41xq2yCx/iV3sOLzo7v4hEgViSLTiPI1L0w==",
-      "dev": true
-    },
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       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.14.0.tgz",
@@ -2246,6 +2240,13 @@
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       "dev": true
     },
+    "node_modules/mgrs": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/mgrs/-/mgrs-1.0.0.tgz",
+      "integrity": "sha512-awNbTOqCxK1DBGjalK3xqWIstBZgN6fxsMSiXLs9/spqWkF2pAhb2rrYCFSsr1/tT7PhcDGjZndG8SWYn0byYA==",
+      "dev": true,
+      "license": "MIT"
+    },
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       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
@@ -2520,6 +2521,20 @@
         "node": ">=6.0.0"
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+    "node_modules/proj4": {
+      "version": "2.19.7",
+      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.19.7.tgz",
+      "integrity": "sha512-1YdHp6/MyGh6s0T1zCwGnOUiah/ov/8HJYkHMXHD8YuUTpkbo82OuCSivSs4ydCIODZVico5QVTTXi5yoDkMZA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "mgrs": "1.0.0",
+        "wkt-parser": "^1.5.1"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ahocevar"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -3189,6 +3204,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
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+    "node_modules/wkt-parser": {
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/wkt-parser/-/wkt-parser-1.5.2.tgz",
+      "integrity": "sha512-1ZUiV1FTwSiSrgWzV9KXJuOF2BVW91KY/mau04BhnmgOdroRQea7Q0s5TVqwGLm0D2tZwObd/tBYXW49sSxp3Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -3420,12 +3442,6 @@
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       "dev": true
     },
-    "@types/proj4": {
-      "version": "2.5.6",
-      "resolved": "https://registry.npmjs.org/@types/proj4/-/proj4-2.5.6.tgz",
-      "integrity": "sha512-zfMrPy9fx+8DchqM0kIUGeu2tTVB5ApO1KGAYcSGFS8GoqRIkyL41xq2yCx/iV3sOLzo7v4hEgViSLTiPI1L0w==",
-      "dev": true
-    },
     "acorn": {
       "version": "8.14.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.14.0.tgz",
@@ -4764,6 +4780,12 @@
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       "dev": true
     },
+    "mgrs": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/mgrs/-/mgrs-1.0.0.tgz",
+      "integrity": "sha512-awNbTOqCxK1DBGjalK3xqWIstBZgN6fxsMSiXLs9/spqWkF2pAhb2rrYCFSsr1/tT7PhcDGjZndG8SWYn0byYA==",
+      "dev": true
+    },
     "minimatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
@@ -4949,6 +4971,16 @@
         "fast-diff": "^1.1.2"
       }
     },
+    "proj4": {
+      "version": "2.19.7",
+      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.19.7.tgz",
+      "integrity": "sha512-1YdHp6/MyGh6s0T1zCwGnOUiah/ov/8HJYkHMXHD8YuUTpkbo82OuCSivSs4ydCIODZVico5QVTTXi5yoDkMZA==",
+      "dev": true,
+      "requires": {
+        "mgrs": "1.0.0",
+        "wkt-parser": "^1.5.1"
+      }
+    },
     "punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -5423,6 +5455,12 @@
         "has-tostringtag": "^1.0.2"
       }
     },
+    "wkt-parser": {
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/wkt-parser/-/wkt-parser-1.5.2.tgz",
+      "integrity": "sha512-1ZUiV1FTwSiSrgWzV9KXJuOF2BVW91KY/mau04BhnmgOdroRQea7Q0s5TVqwGLm0D2tZwObd/tBYXW49sSxp3Q==",
+      "dev": true
+    },
     "word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
diff --git a/package.json b/package.json
index 359c24c..79ac578 100644
--- a/package.json
+++ b/package.json
@@ -25,11 +25,11 @@
   },
   "devDependencies": {
     "@types/geojson": "^7946.0.10",
-    "@types/proj4": "^2.5.2",
     "deep-diff-pizza": "^1.0.2",
     "eslint": "^9.16.0",
     "eslint-config-openlayers": "^20.0.0",
     "fs-extra": "^11.1.0",
-    "jsdoc": "^4.0.2"
+    "jsdoc": "^4.0.2",
+    "proj4": "^2.19.7"
   }
 }