diff --git a/package-lock.json b/package-lock.json
index 2e82b9c..0c7f063 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "plugin-updater",
-  "version": "1.1.1",
+  "version": "1.2.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -779,6 +779,14 @@
         "browserslist": "2.11.3",
         "invariant": "2.2.3",
         "semver": "5.5.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+          "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
+          "dev": true
+        }
       }
     },
     "babel-register": {
@@ -1375,6 +1383,12 @@
           "integrity": "sha512-kkpcKNlmQan9Z5ZmgqKH/SMbSmjxQ7QjyNqfXVc8VJcoBV2UEg+sxQD15GQofGRh2hfpwUb70VC31DR7Rq5Hdw==",
           "dev": true
         },
+        "semver": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+          "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
+          "dev": true
+        },
         "strip-ansi": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
@@ -1770,7 +1784,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.1.1",
@@ -1821,7 +1836,8 @@
         "balanced-match": {
           "version": "0.4.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "bcrypt-pbkdf": {
           "version": "1.0.1",
@@ -1836,6 +1852,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -1844,6 +1861,7 @@
           "version": "2.10.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -1852,6 +1870,7 @@
           "version": "1.1.7",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "0.4.2",
             "concat-map": "0.0.1"
@@ -1860,7 +1879,8 @@
         "buffer-shims": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.12.0",
@@ -1877,12 +1897,14 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "delayed-stream": "1.0.0"
           }
@@ -1890,22 +1912,26 @@
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1"
           }
@@ -1945,7 +1971,8 @@
         "delayed-stream": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "delegates": {
           "version": "1.0.0",
@@ -1977,7 +2004,8 @@
         "extsprintf": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -1999,12 +2027,14 @@
         "fs.realpath": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "fstream": {
           "version": "1.0.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "graceful-fs": "4.1.11",
             "inherits": "2.0.3",
@@ -2060,6 +2090,7 @@
           "version": "7.1.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "1.0.0",
             "inflight": "1.0.6",
@@ -2072,7 +2103,8 @@
         "graceful-fs": {
           "version": "4.1.11",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "har-schema": {
           "version": "1.0.5",
@@ -2100,6 +2132,7 @@
           "version": "3.1.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1",
             "cryptiles": "2.0.5",
@@ -2110,7 +2143,8 @@
         "hoek": {
           "version": "2.16.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "http-signature": {
           "version": "1.1.1",
@@ -2127,6 +2161,7 @@
           "version": "1.0.6",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "once": "1.4.0",
             "wrappy": "1.0.2"
@@ -2135,7 +2170,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.4",
@@ -2147,6 +2183,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -2160,7 +2197,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -2233,12 +2271,14 @@
         "mime-db": {
           "version": "1.27.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.27.0"
           }
@@ -2247,6 +2287,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.7"
           }
@@ -2254,12 +2295,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2314,7 +2357,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "oauth-sign": {
           "version": "0.8.2",
@@ -2332,6 +2376,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -2361,7 +2406,8 @@
         "path-is-absolute": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "performance-now": {
           "version": "0.2.0",
@@ -2372,7 +2418,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "punycode": {
           "version": "1.4.1",
@@ -2410,6 +2457,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "1.0.0",
             "core-util-is": "1.0.2",
@@ -2454,6 +2502,7 @@
           "version": "2.6.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "glob": "7.1.2"
           }
@@ -2461,7 +2510,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "semver": {
           "version": "5.3.0",
@@ -2485,6 +2535,7 @@
           "version": "1.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -2518,6 +2569,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
@@ -2528,6 +2580,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.0.1"
           }
@@ -2542,6 +2595,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -2556,6 +2610,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -2611,7 +2666,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -2640,7 +2696,8 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -2713,6 +2770,7 @@
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-2.0.0.tgz",
       "integrity": "sha1-gTg9ctsFT8zPUzbaqQLxgvbtuyg=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-glob": "2.0.1"
       }
@@ -2981,7 +3039,8 @@
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
       "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "is-builtin-module": {
       "version": "1.0.0",
@@ -3020,7 +3079,8 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-1.0.0.tgz",
       "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "is-finite": {
       "version": "1.0.2",
@@ -3041,6 +3101,7 @@
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-2.0.1.tgz",
       "integrity": "sha1-0Jb5JqPe1WAPP9/ZEZjLCIjC2GM=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-extglob": "1.0.0"
       }
@@ -3250,6 +3311,7 @@
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-buffer": "1.1.6"
       }
@@ -3448,6 +3510,14 @@
         "is-builtin-module": "1.0.0",
         "semver": "5.5.0",
         "validate-npm-package-license": "3.0.1"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
+          "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
+          "dev": true
+        }
       }
     },
     "normalize-path": {
@@ -3455,6 +3525,7 @@
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-2.1.1.tgz",
       "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
       "dev": true,
+      "optional": true,
       "requires": {
         "remove-trailing-separator": "1.1.0"
       }
@@ -4095,13 +4166,15 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz",
       "integrity": "sha1-wkvOKig62tW8P1jg1IJJuSN52O8=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "repeat-element": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/repeat-element/-/repeat-element-1.1.2.tgz",
       "integrity": "sha1-7wiaF40Ug7quTZPrmLT55OEdmQo=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "repeat-string": {
       "version": "1.6.1",
@@ -4243,9 +4316,9 @@
       "dev": true
     },
     "semver": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
-      "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA=="
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.1.1.tgz",
+      "integrity": "sha512-rWYq2e5iYW+fFe/oPPtYJxYgjBm8sC4rmoGdUOgBB7VnwKt6HrL793l2voH1UlsyYZpJ4g0wfjnTEO1s1NP2eQ=="
     },
     "set-blocking": {
       "version": "2.0.0",
diff --git a/package.json b/package.json
index 19b1c85..740da3a 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "chalk": "^2.3.1",
     "js-yaml": "^3.10.0",
     "loglevel": "^1.6.1",
-    "semver": "^5.5.0",
+    "semver": "^6.1.1",
     "yargs": "^11.0.0",
     "yauzl": "^2.9.1"
   }