diff --git a/package-lock.json b/package-lock.json
index 999a6d5f6..68e11089a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -287,9 +287,9 @@
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     },
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-      "version": "8.10.13",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.13.tgz",
-      "integrity": "sha512-AorNXRHoPVxIUIVmr6uJXRnvlPOSNKAJF5jZ1JOj1/IxYMocZzvQooNeLU02Db6kpy1IVIySTOvuIxmUF1HrOg==",
+      "version": "8.10.10",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.10.tgz",
+      "integrity": "sha512-p3W/hFzQs76RlYRIZsZc5a9bht6m0TspmWYYbKhRswmLnwj9fsE40EbuGifeu/XWR/c0UJQ1DDbvTxIsm/OOAA==",
       "dev": true
     },
     "@types/pako": {
@@ -305,12 +305,13 @@
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-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/@types/readable-stream/-/readable-stream-2.3.0.tgz",
-      "integrity": "sha512-c0+lRjSeBakp3YJaP4BixI+sWWO5JFsG3wKAlUNl2olBB5sbXY8rgRbFbBwLkuuX3xSxNqpCZzeROJzMlsCdig==",
+      "version": "2.3.9",
+      "resolved": "https://registry.npmjs.org/@types/readable-stream/-/readable-stream-2.3.9.tgz",
+      "integrity": "sha512-sqsgQqFT7HmQz/V5jH1O0fvQQnXAJO46Gg9LRO/JPfjmVmGUlcx831TZZO3Y3HtWhIkzf3kTsNT0Z0kzIhIvZw==",
       "dev": true,
       "requires": {
-        "@types/node": "*"
+        "@types/node": "*",
+        "safe-buffer": "*"
       }
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     "@types/semver": {
@@ -362,15 +363,15 @@
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-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
-      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+      "version": "6.12.3",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.3.tgz",
+      "integrity": "sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==",
       "dev": true,
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
+        "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
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@@ -1786,9 +1787,9 @@
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-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
-      "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ=",
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
       "dev": true
     },
     "fast-json-stable-stringify": {
@@ -2621,6 +2622,32 @@
       "requires": {
         "ajv": "^5.3.0",
         "har-schema": "^2.0.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "5.5.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
+          "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+          "dev": true,
+          "requires": {
+            "co": "^4.6.0",
+            "fast-deep-equal": "^1.0.0",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.3.0"
+          }
+        },
+        "fast-deep-equal": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
+          "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ=",
+          "dev": true
+        },
+        "json-schema-traverse": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz",
+          "integrity": "sha1-NJptRMU6Ud6JtAgFxdXlm0F9M0A=",
+          "dev": true
+        }
       }
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@@ -3608,6 +3635,12 @@
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           "dev": true
         },
+        "fast-deep-equal": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
+          "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ=",
+          "dev": true
+        },
         "har-validator": {
           "version": "5.1.0",
           "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.0.tgz",
@@ -3616,8 +3649,28 @@
           "requires": {
             "ajv": "^5.3.0",
             "har-schema": "^2.0.0"
+          },
+          "dependencies": {
+            "ajv": {
+              "version": "5.5.2",
+              "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
+              "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+              "dev": true,
+              "requires": {
+                "co": "^4.6.0",
+                "fast-deep-equal": "^1.0.0",
+                "fast-json-stable-stringify": "^2.0.0",
+                "json-schema-traverse": "^0.3.0"
+              }
+            }
           }
         },
+        "json-schema-traverse": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz",
+          "integrity": "sha1-NJptRMU6Ud6JtAgFxdXlm0F9M0A=",
+          "dev": true
+        },
         "mime-db": {
           "version": "1.35.0",
           "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.35.0.tgz",
@@ -3700,9 +3753,9 @@
       "dev": true
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     "json-schema-traverse": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz",
-      "integrity": "sha1-NJptRMU6Ud6JtAgFxdXlm0F9M0A=",
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
       "dev": true
     },
     "json-stable-stringify": {
@@ -6175,6 +6228,23 @@
         }
       }
     },
+    "uri-js": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
+      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      },
+      "dependencies": {
+        "punycode": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+          "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
+          "dev": true
+        }
+      }
+    },
     "urijs": {
       "version": "1.19.1",
       "resolved": "https://registry.npmjs.org/urijs/-/urijs-1.19.1.tgz",
diff --git a/package.json b/package.json
index 4de77751e..0e561559d 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "@types/shelljs": "^0.7.8",
     "@types/semver": "^5.5.0",
     "@types/yaml": "^1.0.2",
-    "ajv": "^5.5.2",
+    "ajv": "^6.12.3",
     "deep-equal": "^1.0.1",
     "elm": "0.18.0-exp5",
     "exit": "^0.1.2",