diff --git a/package-lock.json b/package-lock.json
index 0a0ed29..fdcf3a0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -810,9 +810,9 @@
       "dev": true
     },
     "ndarray": {
-      "version": "1.0.18",
-      "resolved": "https://registry.npmjs.org/ndarray/-/ndarray-1.0.18.tgz",
-      "integrity": "sha1-tg06cyJOxVXQ+qeXEeUCRI/T95M=",
+      "version": "1.0.19",
+      "resolved": "https://registry.npmjs.org/ndarray/-/ndarray-1.0.19.tgz",
+      "integrity": "sha512-B4JHA4vdyZU30ELBw3g7/p9bZupyew5a7tX1Y/gGeF2hafrPaQZhgrGQfsvgfYbgdFZjYwuEcnaobeM/WMW+HQ==",
       "requires": {
         "iota-array": "^1.0.0",
         "is-buffer": "^1.0.2"
diff --git a/package.json b/package.json
index 683f64f..6543138 100644
--- a/package.json
+++ b/package.json
@@ -8,17 +8,17 @@
   },
   "dependencies": {
     "cdt2d": "^1.0.0",
-    "clean-pslg": "^1.1.0",
-    "ndarray": "^1.0.11",
-    "planar-graph-to-polyline": "^1.0.0",
+    "clean-pslg": "^1.1.2",
+    "ndarray": "^1.0.19",
+    "planar-graph-to-polyline": "^1.0.5",
     "simplify-planar-graph": "^2.0.1",
-    "surface-nets": "^1.0.0",
-    "triangulate-polyline": "^1.0.0"
+    "surface-nets": "^1.0.2",
+    "triangulate-polyline": "^1.0.3"
   },
   "devDependencies": {
-    "get-pixels": "^3.1.0",
-    "ndarray-imshow": "^1.0.0",
-    "save-pixels": "^2.2.0",
+    "get-pixels": "^3.3.2",
+    "ndarray-imshow": "^1.0.1",
+    "save-pixels": "^2.3.4",
     "tape": "^3.0.3"
   },
   "scripts": {