diff --git a/package-lock.json b/package-lock.json
index 4c5d3fb0..23c32e82 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17425,12 +17425,12 @@
       }
     },
     "node_modules/proj4": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.14.0.tgz",
-      "integrity": "sha512-fumDL50ThQ3issOLxaLYwv1j4LePEzYleY6vqsX+2uWOcvKzqpzHhtTTH18CvIDg+nf8MYl0/XF6yYyESKDi4w==",
+      "version": "2.15.0",
+      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.15.0.tgz",
+      "integrity": "sha512-LqCNEcPdI03BrCHxPLj29vsd5afsm+0sV1H/O3nTDKrv8/LA01ea1z4QADDMjUqxSXWnrmmQDjqFm1J/uZ5RLw==",
       "dependencies": {
         "mgrs": "1.0.0",
-        "wkt-parser": "^1.3.3"
+        "wkt-parser": "^1.4.0"
       }
     },
     "node_modules/promise-all-reject-late": {
@@ -20921,7 +20921,7 @@
         "moment": "^2.30.1",
         "murmurhash": "^2.0.1",
         "ngeohash": "^0.6.3",
-        "proj4": "^2.14.0",
+        "proj4": "^2.15.0",
         "simple-statistics": "^7.8.7",
         "wkt-parser": "^1.4.0"
       },
@@ -23127,7 +23127,7 @@
         "moment": "^2.30.1",
         "murmurhash": "^2.0.1",
         "ngeohash": "^0.6.3",
-        "proj4": "^2.14.0",
+        "proj4": "^2.15.0",
         "proxyquire": "^2.1.3",
         "simple-statistics": "^7.8.7",
         "sinon": "^18.0.0",
@@ -33448,12 +33448,12 @@
       "dev": true
     },
     "proj4": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.14.0.tgz",
-      "integrity": "sha512-fumDL50ThQ3issOLxaLYwv1j4LePEzYleY6vqsX+2uWOcvKzqpzHhtTTH18CvIDg+nf8MYl0/XF6yYyESKDi4w==",
+      "version": "2.15.0",
+      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.15.0.tgz",
+      "integrity": "sha512-LqCNEcPdI03BrCHxPLj29vsd5afsm+0sV1H/O3nTDKrv8/LA01ea1z4QADDMjUqxSXWnrmmQDjqFm1J/uZ5RLw==",
       "requires": {
         "mgrs": "1.0.0",
-        "wkt-parser": "^1.3.3"
+        "wkt-parser": "^1.4.0"
       }
     },
     "promise-all-reject-late": {
diff --git a/packages/winnow/package.json b/packages/winnow/package.json
index dcb682ac..dc8ad570 100644
--- a/packages/winnow/package.json
+++ b/packages/winnow/package.json
@@ -64,7 +64,7 @@
     "moment": "^2.30.1",
     "murmurhash": "^2.0.1",
     "ngeohash": "^0.6.3",
-    "proj4": "^2.14.0",
+    "proj4": "^2.15.0",
     "simple-statistics": "^7.8.7",
     "wkt-parser": "^1.4.0"
   },