diff --git a/package.json b/package.json
index 027ac7bcb1..efa2618f91 100644
--- a/package.json
+++ b/package.json
@@ -128,7 +128,7 @@
     "mapv": "2.0.40",
     "ol": "6.1.1",
     "pbf": "3.2.1",
-    "proj4": "2.5.0",
+    "proj4": "2.6.0",
     "promise-polyfill": "8.1.3",
     "three": "0.92.0",
     "xlsx": "0.15.3",
diff --git a/src/leaflet/package.json b/src/leaflet/package.json
index bb58260743..b70c5200c6 100644
--- a/src/leaflet/package.json
+++ b/src/leaflet/package.json
@@ -22,7 +22,7 @@
     "@mapbox/vector-tile": "1.3.0",
     "jsonsql": "0.2.5",
     "pbf": "3.2.1",
-    "proj4": "2.5.0",
+    "proj4": "2.6.0",
     "xlsx": "0.15.3"
   }
 }
diff --git a/src/openlayers/package.json b/src/openlayers/package.json
index cf31f04d23..8e563d7491 100644
--- a/src/openlayers/package.json
+++ b/src/openlayers/package.json
@@ -19,7 +19,7 @@
     "mapv": "2.0.38",
     "ol": "6.1.1",
     "@supermap/iclient-common": "10.0.1",
-    "proj4": "2.5.0",
+    "proj4": "2.6.0",
     "xlsx": "0.15.3",
     "canvg": "1.5.3",
     "lodash.remove": "^4.7.0"