diff --git a/assets/leaflet-treering/package-lock.json b/assets/leaflet-treering/package-lock.json
index e5d963a7..40f85ca6 100644
--- a/assets/leaflet-treering/package-lock.json
+++ b/assets/leaflet-treering/package-lock.json
@@ -10,9 +10,9 @@
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-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
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@@ -32,7 +32,7 @@
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@@ -42,7 +42,7 @@
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-      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ=="
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@@ -50,9 +50,9 @@
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-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.6.0.tgz",
-      "integrity": "sha512-jgnQoG9LKnWO3mnVNBnfhkh0QknICd1FGSrXcgrl67zioyJ4wgx25o9ZqwNtrROSflGBCGYnJfjrIyRIby1OoQ==",
+      "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.8.0.tgz",
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@@ -153,7 +153,7 @@
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-      "integrity": "sha1-SysbJ+uAip+NzEgaWOXlb1mfP2E="
+      "integrity": "sha512-Li5AOqrZWCVA2n5kryzEmqai6bKSIvpz5oUJHPVj6+dsbD3X1ixtsY5tEnsaNpH3pFAHmG8eIHUrtEtohrg+UQ=="
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@@ -166,7 +166,7 @@
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-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
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 }
diff --git a/assets/leaflet-treering/package.json b/assets/leaflet-treering/package.json
index dd2a87b7..cf878c3c 100644
--- a/assets/leaflet-treering/package.json
+++ b/assets/leaflet-treering/package.json
@@ -8,7 +8,7 @@
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     "font-awesome": "^4.7.0",
     "jquery": "~3.2.1",
-    "jszip": "^3.6.0",
+    "jszip": "^3.8.0",
     "leaflet": "~1.1.0",
     "leaflet-dialog": "^1.0.5",
     "leaflet-easybutton": "~2.2.0",