diff --git a/server/package-lock.json b/server/package-lock.json
index 82963b6..9086e58 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "canary",
-  "version": "0.0.14",
+  "version": "0.0.16",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10,14 +10,14 @@
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-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.2.tgz",
-      "integrity": "sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==",
+      "version": "6.10.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
+      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
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-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.4.1",
-        "uri-js": "4.2.2"
+        "fast-deep-equal": "^2.0.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
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@@ -45,8 +45,8 @@
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       "requires": {
-        "delegates": "1.0.0",
-        "readable-stream": "2.3.6"
+        "delegates": "^1.0.0",
+        "readable-stream": "^2.0.6"
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@@ -59,7 +59,7 @@
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       "requires": {
-        "safer-buffer": "2.1.2"
+        "safer-buffer": "~2.1.0"
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@@ -97,7 +97,7 @@
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       "integrity": "sha1-9hbtqdPktmuMp/ynn2lXIsX44m8=",
       "requires": {
-        "precond": "0.2.3"
+        "precond": "0.2"
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@@ -110,7 +110,7 @@
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       "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
       "requires": {
-        "tweetnacl": "0.14.5"
+        "tweetnacl": "^0.14.3"
       }
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     "binary-search-tree": {
@@ -118,7 +118,7 @@
       "resolved": "https://registry.npmjs.org/binary-search-tree/-/binary-search-tree-0.2.5.tgz",
       "integrity": "sha1-fbs7IQ/coIJFDa0jNMMErzm9x4Q=",
       "requires": {
-        "underscore": "1.4.4"
+        "underscore": "~1.4.4"
       }
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@@ -126,7 +126,7 @@
       "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
       "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
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-        "inherits": "2.0.3"
+        "inherits": "~2.0.0"
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@@ -139,7 +139,7 @@
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       "requires": {
-        "balanced-match": "1.0.0",
+        "balanced-match": "^1.0.0",
         "concat-map": "0.0.1"
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@@ -153,20 +153,15 @@
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       "integrity": "sha1-mXjOMXOIxkmth5MCjDR37wRKi1E="
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-    "builtin-modules": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
-      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8="
-    },
     "bunyan": {
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       "resolved": "https://registry.npmjs.org/bunyan/-/bunyan-1.8.12.tgz",
       "integrity": "sha1-8VDw9nSKvdcq6uhPBEA74u8RN5c=",
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-        "dtrace-provider": "0.8.7",
-        "moment": "2.23.0",
-        "mv": "2.1.1",
-        "safe-json-stringify": "1.2.0"
+        "dtrace-provider": "~0.8",
+        "moment": "^2.10.6",
+        "mv": "~2",
+        "safe-json-stringify": "~1"
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@@ -174,8 +169,8 @@
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       "integrity": "sha1-yjw2iKTpzzpM2nd9xNy8cTJJz3M=",
       "requires": {
-        "no-case": "2.3.2",
-        "upper-case": "1.1.3"
+        "no-case": "^2.2.0",
+        "upper-case": "^1.1.1"
       }
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@@ -185,11 +180,11 @@
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     "camelcase-keys": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
       "integrity": "sha1-MIvur/3ygRkFHvodkyITyRuPkuc=",
       "requires": {
-        "camelcase": "2.1.1",
-        "map-obj": "1.0.1"
+        "camelcase": "^2.0.0",
+        "map-obj": "^1.0.0"
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     "caseless": {
@@ -199,14 +194,14 @@
     },
     "chalk": {
       "version": "1.1.3",
-      "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "requires": {
-        "ansi-styles": "2.2.1",
-        "escape-string-regexp": "1.0.5",
-        "has-ansi": "2.0.0",
-        "strip-ansi": "3.0.1",
-        "supports-color": "2.0.0"
+        "ansi-styles": "^2.2.1",
+        "escape-string-regexp": "^1.0.2",
+        "has-ansi": "^2.0.0",
+        "strip-ansi": "^3.0.0",
+        "supports-color": "^2.0.0"
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     "checkup": {
@@ -219,8 +214,8 @@
       "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.28.tgz",
       "integrity": "sha1-vxlF6C/ICPVWlebd6uwBQA79A/8=",
       "requires": {
-        "commander": "2.8.1",
-        "source-map": "0.4.4"
+        "commander": "2.8.x",
+        "source-map": "0.4.x"
       }
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     "cliui": {
@@ -228,9 +223,9 @@
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
       "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
       "requires": {
-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1",
-        "wrap-ansi": "2.1.0"
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1",
+        "wrap-ansi": "^2.0.0"
       }
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     "clone": {
@@ -249,19 +244,19 @@
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     },
     "combined-stream": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
-      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
       "requires": {
-        "delayed-stream": "1.0.0"
+        "delayed-stream": "~1.0.0"
       }
     },
     "commander": {
       "version": "2.8.1",
-      "resolved": "http://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
       "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
       "requires": {
-        "graceful-readlink": "1.0.1"
+        "graceful-readlink": ">= 1.0.0"
       }
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     "concat-map": {
@@ -284,8 +279,8 @@
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-3.0.1.tgz",
       "integrity": "sha1-ElYDfsufDF9549bvE14wdwGEuYI=",
       "requires": {
-        "lru-cache": "4.1.5",
-        "which": "1.3.1"
+        "lru-cache": "^4.0.1",
+        "which": "^1.2.9"
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     "css-b64-images": {
@@ -298,10 +293,10 @@
       "resolved": "http://registry.npmjs.org/csv/-/csv-0.4.6.tgz",
       "integrity": "sha1-jbrn3f26rmLB6ph8Pg+Kmsc3tz0=",
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-        "csv-generate": "0.0.6",
-        "csv-parse": "1.3.3",
-        "csv-stringify": "0.0.8",
-        "stream-transform": "0.1.2"
+        "csv-generate": "^0.0.6",
+        "csv-parse": "^1.0.0",
+        "csv-stringify": "^0.0.8",
+        "stream-transform": "^0.1.0"
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@@ -329,7 +324,7 @@
       "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
       "integrity": "sha1-mI3zP+qxke95mmE2nddsF635V+o=",
       "requires": {
-        "array-find-index": "1.0.2"
+        "array-find-index": "^1.0.1"
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     "cycle": {
@@ -342,7 +337,7 @@
       "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
       "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
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-        "assert-plus": "1.0.0"
+        "assert-plus": "^1.0.0"
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@@ -363,7 +358,7 @@
       "resolved": "https://registry.npmjs.org/defaults/-/defaults-1.0.3.tgz",
       "integrity": "sha1-xlYFHpgX2f8I7YgUd/P+QBnz730=",
       "requires": {
-        "clone": "1.0.4"
+        "clone": "^1.0.2"
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@@ -386,8 +381,8 @@
       "resolved": "https://registry.npmjs.org/dns-js/-/dns-js-0.2.1.tgz",
       "integrity": "sha1-XWZimzwOal6w4U8K5wHQX26kZnM=",
       "requires": {
-        "debug": "2.6.9",
-        "qap": "3.3.1"
+        "debug": "^2.1.0",
+        "qap": "^3.1.2"
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@@ -396,7 +391,7 @@
       "integrity": "sha1-3JObTT4GIM/gwc2APQ0tftBP/QQ=",
       "optional": true,
       "requires": {
-        "nan": "2.12.0"
+        "nan": "^2.10.0"
       }
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@@ -409,8 +404,8 @@
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
       "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
       "requires": {
-        "jsbn": "0.1.1",
-        "safer-buffer": "2.1.2"
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.1.0"
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@@ -418,7 +413,7 @@
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       "requires": {
-        "is-arrayish": "0.2.1"
+        "is-arrayish": "^0.2.1"
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@@ -441,13 +436,13 @@
       "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-4.0.1.tgz",
       "integrity": "sha512-qACXdu/9VHPBzcyhdOWR5/IahhGMf0roTeZJfzz077GwylcDd90yOHLouhmv7GJ5XzPi6ekaQWd8AvPP2nOvpA==",
       "requires": {
-        "duplexer": "0.1.1",
-        "from": "0.1.7",
+        "duplexer": "^0.1.1",
+        "from": "^0.1.7",
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-        "pause-stream": "0.0.11",
-        "split": "1.0.1",
-        "stream-combiner": "0.2.2",
-        "through": "2.3.8"
+        "pause-stream": "^0.0.11",
+        "split": "^1.0.1",
+        "stream-combiner": "^0.2.2",
+        "through": "^2.3.8"
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@@ -455,7 +450,7 @@
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       "integrity": "sha512-FIUCJz1RbuS0FKTdaAafAByGS0CPvU3R0MeHxgtl+djzCc//F8HakL8GzmVNZanasTbTAY/3DRFA0KpVqj/eAw==",
       "requires": {
-        "merge": "1.2.1"
+        "merge": "^1.2.0"
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@@ -493,8 +488,8 @@
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       "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
       "requires": {
-        "path-exists": "2.1.0",
-        "pinkie-promise": "2.0.1"
+        "path-exists": "^2.0.0",
+        "pinkie-promise": "^2.0.0"
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@@ -517,9 +512,9 @@
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       "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
       "requires": {
-        "asynckit": "0.4.0",
-        "combined-stream": "1.0.7",
-        "mime-types": "2.1.21"
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.6",
+        "mime-types": "^2.1.12"
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@@ -537,9 +532,9 @@
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       "integrity": "sha512-q6rbdDd1o2mAnQreO7YADIxf/Whx4AHBiRf6d+/cVT8h44ss+lHgxf1FemcqDnQt9X3ct4McHr+JMGlYSsK7Cg==",
       "requires": {
-        "graceful-fs": "4.1.15",
-        "jsonfile": "4.0.0",
-        "universalify": "0.1.2"
+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
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     "fs.realpath": {
@@ -548,14 +543,14 @@
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
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-      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
-      "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.12.tgz",
+      "integrity": "sha512-WvJ193OHa0GHPEL+AycEJgxvBEwyfRkN1vhjca23OaPVMCaLCXTd5qAu82AjTcgP1UJmytkOKb63Ypde7raDIg==",
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-        "graceful-fs": "4.1.15",
-        "inherits": "2.0.3",
-        "mkdirp": "0.5.1",
-        "rimraf": "2.6.2"
+        "graceful-fs": "^4.1.2",
+        "inherits": "~2.0.0",
+        "mkdirp": ">=0.5 0",
+        "rimraf": "2"
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@@ -563,14 +558,14 @@
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-        "has-unicode": "2.0.1",
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-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1",
-        "wide-align": "1.1.3"
+        "aproba": "^1.0.3",
+        "console-control-strings": "^1.0.0",
+        "has-unicode": "^2.0.0",
+        "object-assign": "^4.1.0",
+        "signal-exit": "^3.0.0",
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1",
+        "wide-align": "^1.1.0"
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@@ -578,7 +573,7 @@
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       "requires": {
-        "globule": "1.2.1"
+        "globule": "^1.0.0"
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@@ -596,20 +591,20 @@
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       "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
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-        "assert-plus": "1.0.0"
+        "assert-plus": "^1.0.0"
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-      "version": "7.1.3",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-      "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
+      "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
       "requires": {
-        "fs.realpath": "1.0.0",
-        "inflight": "1.0.6",
-        "inherits": "2.0.3",
-        "minimatch": "3.0.4",
-        "once": "1.4.0",
-        "path-is-absolute": "1.0.1"
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.0.4",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
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@@ -617,9 +612,9 @@
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       "requires": {
-        "glob": "7.1.3",
-        "lodash": "4.17.11",
-        "minimatch": "3.0.4"
+        "glob": "~7.1.1",
+        "lodash": "~4.17.10",
+        "minimatch": "~3.0.2"
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+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
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@@ -2246,9 +2263,9 @@
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       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "requires": {
-        "assert-plus": "1.0.0",
+        "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
-        "extsprintf": "1.3.0"
+        "extsprintf": "^1.2.0"
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@@ -2256,8 +2273,8 @@
       "resolved": "https://registry.npmjs.org/watch/-/watch-0.16.0.tgz",
       "integrity": "sha1-ly+Y6rrlYQwRb2QyRQ7qkd9oq3E=",
       "requires": {
-        "exec-sh": "0.2.2",
-        "minimist": "1.2.0"
+        "exec-sh": "^0.2.0",
+        "minimist": "^1.1.0"
       },
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         "minimist": {
@@ -2272,7 +2289,7 @@
       "resolved": "https://registry.npmjs.org/wbuf/-/wbuf-1.7.3.tgz",
       "integrity": "sha512-O84QOnr0icsbFGLS0O3bI5FswxzRr8/gHwWkDlQFskhSPryQXvrTMxjxGP4+iWYoauLoBvfDpkrOauZ+0iZpDA==",
       "requires": {
-        "minimalistic-assert": "1.0.1"
+        "minimalistic-assert": "^1.0.0"
       }
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     "which": {
@@ -2280,7 +2297,7 @@
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
       "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
       }
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     "which-module": {
@@ -2293,7 +2310,7 @@
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
       "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "requires": {
-        "string-width": "1.0.2"
+        "string-width": "^1.0.2 || 2"
       }
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     "winston": {
@@ -2301,22 +2318,22 @@
       "resolved": "https://registry.npmjs.org/winston/-/winston-2.4.4.tgz",
       "integrity": "sha512-NBo2Pepn4hK4V01UfcWcDlmiVTs7VTB1h7bgnB0rgP146bYhMxX0ypCz3lBOfNxCO4Zuek7yeT+y/zM1OfMw4Q==",
       "requires": {
-        "async": "1.0.0",
-        "colors": "1.0.3",
-        "cycle": "1.0.3",
-        "eyes": "0.1.8",
-        "isstream": "0.1.2",
-        "stack-trace": "0.0.10"
+        "async": "~1.0.0",
+        "colors": "1.0.x",
+        "cycle": "1.0.x",
+        "eyes": "0.1.x",
+        "isstream": "0.1.x",
+        "stack-trace": "0.0.x"
       },
       "dependencies": {
         "async": {
           "version": "1.0.0",
-          "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
           "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k="
         },
         "colors": {
           "version": "1.0.3",
-          "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
+          "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
           "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs="
         }
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@@ -2328,11 +2345,11 @@
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     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "requires": {
-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1"
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
       }
     },
     "wrappy": {
@@ -2345,7 +2362,7 @@
       "resolved": "https://registry.npmjs.org/writejson/-/writejson-1.1.2.tgz",
       "integrity": "sha512-5iMR/5y0z7VUNI3S+wRWiu02VnbwuPzrwnUbopJA2sz1kWvSm6Phz/1ahbgQ76SO1HGB9d/RI+44rEcBFtZbMw==",
       "requires": {
-        "try-catch": "2.0.0"
+        "try-catch": "^2.0.0"
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@@ -2370,19 +2387,19 @@
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-7.1.0.tgz",
       "integrity": "sha1-a6MY6xaWFyf10oT46gA+jWFU0Mg=",
       "requires": {
-        "camelcase": "3.0.0",
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.3",
-        "os-locale": "1.4.0",
-        "read-pkg-up": "1.0.1",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "1.0.2",
-        "which-module": "1.0.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "5.0.0"
+        "camelcase": "^3.0.0",
+        "cliui": "^3.2.0",
+        "decamelize": "^1.1.1",
+        "get-caller-file": "^1.0.1",
+        "os-locale": "^1.4.0",
+        "read-pkg-up": "^1.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^1.0.2",
+        "which-module": "^1.0.0",
+        "y18n": "^3.2.1",
+        "yargs-parser": "^5.0.0"
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@@ -2397,7 +2414,7 @@
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-5.0.0.tgz",
       "integrity": "sha1-J17PDX/+Bcd+ZOfIbkzZS/DhIoo=",
       "requires": {
-        "camelcase": "3.0.0"
+        "camelcase": "^3.0.0"
       },
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         "camelcase": {
diff --git a/server/package.json b/server/package.json
index b61cb12..9613165 100644
--- a/server/package.json
+++ b/server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "canary",
-  "version": "0.0.15",
+  "version": "0.0.16",
   "description": "a music streaming server with DAAP support",
   "author": {
     "name": "Woong Jun",