diff --git a/_config.yml b/_config.yml
index 2fc8652..510a0d4 100644
--- a/_config.yml
+++ b/_config.yml
@@ -31,7 +31,9 @@ skip_render:
 new_post_name: :title.md # File name of new posts
 default_layout: post
 titlecase: false # Transform title into titlecase
-external_link: true # Open external links in new tab
+external_link: # Open external links in new tab
+  enable: true
+  field: post
 filename_case: 0
 render_drafts: false
 post_asset_folder: false
diff --git a/package-lock.json b/package-lock.json
index 9ce0b52..c77c5f0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,118 +4,6 @@
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   "requires": true,
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-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.4.4.tgz",
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-        "jsesc": "^2.5.1",
-        "lodash": "^4.17.11",
-        "source-map": "^0.5.0",
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-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz",
-      "integrity": "sha512-A95XEoCpb3TO+KZzJ4S/5uW5fNe26DjBGqf1o9ucyLyCmi1dXq/B3c8iaWTfBk3VvetUxl16e8tIrd5teOCfGw==",
-      "requires": {
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-        "@babel/types": "^7.0.0"
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-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
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-        "esutils": "^2.0.2",
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-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.5.tgz",
-      "integrity": "sha512-9mUqkL1FF5T7f0WDFfAoDdiMVPWsdD1gZYzSnaXsxUCUqzuch/8of9G3VUSNiZmMBoRxT3neyVsqeiL/ZPcjew=="
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-        "@babel/parser": "^7.4.4",
-        "@babel/types": "^7.4.4"
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-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.4.5.tgz",
-      "integrity": "sha512-Vc+qjynwkjRmIFGxy0KYoPj4FdVDxLej89kMHFsWScq999uX+pwcX4v9mWRjW0KcAYTPAuVQl2LKP1wEVLsp+A==",
-      "requires": {
-        "@babel/code-frame": "^7.0.0",
-        "@babel/generator": "^7.4.4",
-        "@babel/helper-function-name": "^7.1.0",
-        "@babel/helper-split-export-declaration": "^7.4.4",
-        "@babel/parser": "^7.4.5",
-        "@babel/types": "^7.4.4",
-        "debug": "^4.1.0",
-        "globals": "^11.1.0",
-        "lodash": "^4.17.11"
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-      "dependencies": {
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-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-          "requires": {
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-          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
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-    "@babel/types": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.4.4.tgz",
-      "integrity": "sha512-dOllgYdnEFOebhkKCjzSVFqw/PmmB8pH6RGOWkY4GsboQNd47b1fBThBSwlHAq9alF9vc1M3+6oqR47R50L0tQ==",
-      "requires": {
-        "esutils": "^2.0.2",
-        "lodash": "^4.17.11",
-        "to-fast-properties": "^2.0.0"
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       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
@@ -159,6 +47,11 @@
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     },
+    "abab": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.2.tgz",
+      "integrity": "sha512-2scffjvioEmNz0OyDSLGWDfKCVwaKc6l9Pm9kOIREU13ClXZvHpg/nRL5xyjSSSLhOnXqft2HpsAzNEEA8cFFg=="
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -171,32 +64,38 @@
       "requires": {
         "mime-types": "~2.1.24",
         "negotiator": "0.6.2"
-      },
-      "dependencies": {
-        "mime-db": {
-          "version": "1.40.0",
-          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
-          "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA=="
-        },
-        "mime-types": {
-          "version": "2.1.24",
-          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.24.tgz",
-          "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
-          "requires": {
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     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA=="
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
+      "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ=="
+    },
+    "acorn-globals": {
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.4.tgz",
+      "integrity": "sha512-clfQEh21R+D0leSbUdWf3OcfqyaCSAQ8Ryq00bofSekfr9W8u1jyYZo6ir0xu9Gtcf7BjcHJpnbZH7JOCpP60A==",
+      "requires": {
+        "acorn": "^6.0.1",
+        "acorn-walk": "^6.0.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA=="
+        }
+      }
+    },
+    "acorn-walk": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.2.0.tgz",
+      "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA=="
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     "ajv": {
-      "version": "6.10.0",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
-      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
+      "version": "6.10.2",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+      "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
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@@ -233,22 +132,12 @@
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-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
-      "integrity": "sha512-5teOsQWABXHHBFP9y3skS5P3d/WfWXpv3FUpy+LorMrNYaT9pI4oLMQX7jzQ2KklNpGpWHzdCXTDT2Y3XGlZBw==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
+      "integrity": "sha512-mM8522psRCqzV+6LhomX5wgp25YVibjh8Wj23I5RPkPppSVSjyKD2A2mBJmWGa+KN7f2D6LNh9jkBCeyLktzjg==",
       "requires": {
-        "micromatch": "^3.1.4",
-        "normalize-path": "^2.1.1"
-      },
-      "dependencies": {
-        "normalize-path": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-2.1.1.tgz",
-          "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
-          "requires": {
-            "remove-trailing-separator": "^1.0.1"
-          }
-        }
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
       }
     },
     "arch": {
@@ -287,7 +176,8 @@
     "arr-diff": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
-      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA="
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+      "optional": true
     },
     "arr-flatten": {
       "version": "1.1.0",
@@ -299,6 +189,11 @@
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       "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
     },
+    "array-equal": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
+      "integrity": "sha1-jCpe8kcv2ep0KwTHenUJO6J1fJM="
+    },
     "array-find-index": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
@@ -320,7 +215,8 @@
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-      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg="
+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
+      "optional": true
     },
     "arrify": {
       "version": "1.0.1",
@@ -356,9 +252,15 @@
       "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E="
     },
     "async-each": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
+      "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ==",
+      "optional": true
+    },
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-      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
-      "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0="
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
+      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
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@@ -380,19 +282,6 @@
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-    "babel-eslint": {
-      "version": "10.0.2",
-      "resolved": "https://registry.npmjs.org/babel-eslint/-/babel-eslint-10.0.2.tgz",
-      "integrity": "sha512-UdsurWPtgiPgpJ06ryUnuaSXC2s0WoSZnQmEpbAH65XZSdwowgN5MvyP7e88nW07FYXv72erVtpBkxyDVKhH1Q==",
-      "requires": {
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-        "@babel/parser": "^7.0.0",
-        "@babel/traverse": "^7.0.0",
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-        "eslint-scope": "3.7.1",
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@@ -674,9 +563,9 @@
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-      "version": "1.12.0",
-      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.12.0.tgz",
-      "integrity": "sha512-DYWGk01lDcxeS/K9IHPGWfT8PsJmbXRtRd2Sx72Tnb8pcYZQFF1oSDb8hJtS1vhp212q1Rzi5dUf9+nq0o9UIg=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.0.0.tgz",
+      "integrity": "sha512-Phlt0plgpIIBOGTT/ehfFnbNlfsDEiqmzE2KRXoX1bLIlir4X/MR+zSyBEkL05ffWgnRSf/DXv+WrUAVr93/ow=="
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@@ -688,9 +577,9 @@
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-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
-      "integrity": "sha512-MKiLiV+I1AA596t9w1sQJ8jkiSr5+ZKi0WKrYGUn6d1Fx+Ij4tIj+m2WMQSGczs5jZVxV339chE8iwk6F64wjA=="
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.1.tgz",
+      "integrity": "sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg=="
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@@ -707,36 +596,17 @@
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-      "resolved": "https://registry.npmjs.org/braces/-/braces-2.3.2.tgz",
-      "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+      "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
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-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        }
+        "fill-range": "^7.0.1"
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-    "browser-fingerprint": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/browser-fingerprint/-/browser-fingerprint-0.0.1.tgz",
-      "integrity": "sha1-jfPNyiW/fVs1QtYVRdcwBT/OYEo="
+    "browser-process-hrtime": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-0.1.3.tgz",
+      "integrity": "sha512-bRFnI4NnjO6cnyLmOV/7PVoDEMJChlcfN0z4s1YMBY989/SvlfMI1lgCnkFUs53e9gQF+w7qu7XdllSTiSl8Aw=="
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@@ -907,22 +777,18 @@
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+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.2.3.tgz",
+      "integrity": "sha512-GtrxGuRf6bzHQmXWRepvsGnXpkQkVU+D2/9a7dAe4a7v1NhrfZOZ2oKf76M3nOs46fFYL8D+Q8JYA4GYeJ8Cjw==",
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+      "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g=="
+    },
+    "whatwg-url": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
+      "integrity": "sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==",
+      "requires": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
       }
     },
     "which": {
@@ -8395,6 +6712,24 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
+    "ws": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.2.0.tgz",
+      "integrity": "sha512-+SqNqFbwTm/0DC18KYzIsMTnEWpLwJsiasW/O17la4iDRRIO9uaHbvKiAS3AHgTiuuWerK/brj4O6MYZkei9xg==",
+      "requires": {
+        "async-limiter": "^1.0.0"
+      }
+    },
+    "xml-name-validator": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw=="
+    },
+    "xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="
+    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
diff --git a/package.json b/package.json
index b24655c..35d7999 100644
--- a/package.json
+++ b/package.json
@@ -3,22 +3,22 @@
   "version": "0.0.0",
   "private": true,
   "hexo": {
-    "version": "3.9.0"
+    "version": "4.0.0"
   },
   "dependencies": {
     "clean-css": "^4.2.1",
-    "hexo": "^3.9.0",
+    "hexo": "^4.0.0",
     "hexo-all-minifier": "^0.5.3",
-    "hexo-deployer-git": "^1.0.0",
-    "hexo-filter-github-emojis": "^2.0.1",
-    "hexo-generator-archive": "^0.1.4",
-    "hexo-generator-category": "^0.1.3",
-    "hexo-generator-index": "^0.2.0",
-    "hexo-generator-tag": "^0.2.0",
-    "hexo-renderer-ejs": "^0.3.1",
-    "hexo-renderer-marked": "^1.0.1",
-    "hexo-renderer-stylus": "^0.3.1",
-    "hexo-server": "^0.3.3",
+    "hexo-deployer-git": "^2.0.0",
+    "hexo-filter-github-emojis": "^2.1.0",
+    "hexo-generator-archive": "^1.0.0",
+    "hexo-generator-category": "^1.0.0",
+    "hexo-generator-index": "^1.0.0",
+    "hexo-generator-tag": "^1.0.0",
+    "hexo-renderer-ejs": "^1.0.0",
+    "hexo-renderer-marked": "^2.0.0",
+    "hexo-renderer-stylus": "^1.1.0",
+    "hexo-server": "^1.0.0",
     "uglify-es": "^3.3.9"
   }
-}
+}
\ No newline at end of file
diff --git a/themes/icarus b/themes/icarus
index abe1b82..98d8bcc 160000
--- a/themes/icarus
+++ b/themes/icarus
@@ -1 +1 @@
-Subproject commit abe1b82d44790795be9e33250684e0596e403d03
+Subproject commit 98d8bcc8a5efabca8643399a3b8a326c20ead45e