diff --git a/package.json b/package.json
index 82bbdfd..88ea9e2 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "bluebird": "^3.5.5",
     "classnames": "^2.2.6",
     "codecov": "^3.5.0",
-    "gatsby": "^2.13.44",
+    "gatsby": "^2.13.50",
     "gatsby-link": "^2.2.4",
     "gatsby-plugin-catch-links": "^2.1.2",
     "gatsby-plugin-feed": "^2.3.6",
@@ -52,20 +52,20 @@
     "gatsby-plugin-netlify-cms": "^4.1.6",
     "gatsby-plugin-offline": "^2.2.4",
     "gatsby-plugin-optimize-svgs": "^1.0.3",
-    "gatsby-plugin-react-helmet": "^3.1.2",
-    "gatsby-plugin-sass": "^2.1.3",
+    "gatsby-plugin-react-helmet": "^3.1.3",
+    "gatsby-plugin-sass": "^2.1.4",
     "gatsby-plugin-sharp": "^2.2.9",
-    "gatsby-plugin-sitemap": "^2.2.4",
+    "gatsby-plugin-sitemap": "^2.2.5",
     "gatsby-remark-autolink-headers": "^2.1.3",
-    "gatsby-remark-copy-linked-files": "^2.1.3",
+    "gatsby-remark-copy-linked-files": "^2.1.4",
     "gatsby-remark-external-links": "0.0.4",
     "gatsby-remark-images": "^3.1.7",
     "gatsby-remark-katex": "^3.1.2",
-    "gatsby-remark-prismjs": "^3.3.3",
+    "gatsby-remark-prismjs": "^3.3.4",
     "gatsby-remark-relative-images": "^0.2.2",
     "gatsby-remark-responsive-iframe": "^2.2.4",
     "gatsby-remark-smartypants": "^2.1.2",
-    "gatsby-source-filesystem": "^2.1.6",
+    "gatsby-source-filesystem": "^2.1.8",
     "gatsby-transformer-remark": "^2.6.10",
     "gatsby-transformer-sharp": "^2.2.5",
     "invariant": "^2.2.4",
diff --git a/yarn.lock b/yarn.lock
index 3a8efd4..2baed1a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5579,9 +5579,10 @@ fuzzy@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/fuzzy/-/fuzzy-0.1.3.tgz#4c76ec2ff0ac1a36a9dccf9a00df8623078d4ed8"
 
-gatsby-cli@^2.7.21:
-  version "2.7.21"
-  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.7.21.tgz#c406a39013cd3ddce05e6be2504fbf380e6bff1f"
+gatsby-cli@^2.7.26:
+  version "2.7.26"
+  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.7.26.tgz#e1194d92aa57ee739c1818fce63d502dde6dff09"
+  integrity sha512-QqCppRfFTeJM1ce4lf/WEZHXdcKAATq1WqgwjLpDfUzeZI9XZSzSh74v1+wGZh8TA+J5hzkieTdQV7eP5YRjYQ==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     "@babel/runtime" "^7.0.0"
@@ -5599,7 +5600,7 @@ gatsby-cli@^2.7.21:
     execa "^0.8.0"
     fs-exists-cached "^1.0.0"
     fs-extra "^4.0.1"
-    gatsby-telemetry "^1.1.7"
+    gatsby-telemetry "^1.1.11"
     hosted-git-info "^2.6.0"
     is-valid-path "^0.1.1"
     lodash "^4.17.14"
@@ -5748,15 +5749,17 @@ gatsby-plugin-page-creator@^2.1.5:
     lodash "^4.17.14"
     micromatch "^3.1.10"
 
-gatsby-plugin-react-helmet@^3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-react-helmet/-/gatsby-plugin-react-helmet-3.1.2.tgz#cde010f708581db4afbb3014257a6cef5c062116"
+gatsby-plugin-react-helmet@^3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-react-helmet/-/gatsby-plugin-react-helmet-3.1.3.tgz#a18033a5fec7ec39614204831a1e5094337e56e1"
+  integrity sha512-S/1B/9JxHFEyeZ/d0BFzJYX9Gd5XBNvLJ7vLd7f7ZzFiqOYpNchnliF87cX+/BuR1gj+v2ypZ7tLRA4LE4PyBw==
   dependencies:
     "@babel/runtime" "^7.0.0"
 
-gatsby-plugin-sass@^2.1.3:
-  version "2.1.3"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-2.1.3.tgz#e829e416916b7a288eb435324bb0308da91e03ef"
+gatsby-plugin-sass@^2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-2.1.4.tgz#93602fe2ccff6a1b86b392e36becfc783e92feb8"
+  integrity sha512-aVd5rBKUNn4AzvxbRZKMKAo0x5y532Adj5wUWGbd0wW0yyAuGa0nc/wd58Wf7kVChTI1uAaOMnbGh+mW6owmjw==
   dependencies:
     "@babel/runtime" "^7.0.0"
     sass-loader "^7.0.1"
@@ -5784,9 +5787,10 @@ gatsby-plugin-sharp@^2.2.9:
     sharp "^0.22.1"
     svgo "^1.2.0"
 
-gatsby-plugin-sitemap@^2.2.4:
-  version "2.2.4"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-sitemap/-/gatsby-plugin-sitemap-2.2.4.tgz#daec113ad4c64aea61f52f37ee7880ac1e825bac"
+gatsby-plugin-sitemap@^2.2.5:
+  version "2.2.5"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sitemap/-/gatsby-plugin-sitemap-2.2.5.tgz#f1232e1d79ba16918fe41ed9cfa1f007a57c9cf9"
+  integrity sha512-RX6cyJm/SmaPb9Ou2n7qdJaweGMusAS+tTOrQURDhbOAkc60KNPpO4Z7aIo+UPXvkmS+D7VFhZlgwA3LtZuVrA==
   dependencies:
     "@babel/runtime" "^7.0.0"
     minimatch "^3.0.4"
@@ -5811,9 +5815,10 @@ gatsby-remark-autolink-headers@^2.1.3:
     mdast-util-to-string "^1.0.2"
     unist-util-visit "^1.3.0"
 
-gatsby-remark-copy-linked-files@^2.1.3:
-  version "2.1.3"
-  resolved "https://registry.yarnpkg.com/gatsby-remark-copy-linked-files/-/gatsby-remark-copy-linked-files-2.1.3.tgz#4b5d632a8907d2a327231a76c79e6c023852e745"
+gatsby-remark-copy-linked-files@^2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/gatsby-remark-copy-linked-files/-/gatsby-remark-copy-linked-files-2.1.4.tgz#b545897122a19ff3a719d6673035cf53b2b9414b"
+  integrity sha512-CEJYF4mj3Z4+s9yoUOyaQA/L0deydC/gu6Kay/PFwTyIDcgkWG1RFsFocEcEb6kbgimZxTElsbDk0MOulr1NIg==
   dependencies:
     "@babel/runtime" "^7.0.0"
     cheerio "^1.0.0-rc.2"
@@ -5856,9 +5861,10 @@ gatsby-remark-katex@^3.1.2:
     remark-math "^1.0.3"
     unist-util-visit "^1.3.0"
 
-gatsby-remark-prismjs@^3.3.3:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/gatsby-remark-prismjs/-/gatsby-remark-prismjs-3.3.3.tgz#9bbe4650bf466e708d98b20a269c9b322ae50e5b"
+gatsby-remark-prismjs@^3.3.4:
+  version "3.3.4"
+  resolved "https://registry.yarnpkg.com/gatsby-remark-prismjs/-/gatsby-remark-prismjs-3.3.4.tgz#63d51992e9bf82723502e080a8d6c7aacc1096d2"
+  integrity sha512-fSFMOmzXOZKkNrAvUMUTJcVC0smKZYS9eL99DfgH0oV/EaSEYZntmUTWRR8p+3wnWFhrYq6MHEwG8MqB3b/hpw==
   dependencies:
     "@babel/runtime" "^7.0.0"
     parse-numeric-range "^0.0.2"
@@ -5895,9 +5901,10 @@ gatsby-remark-smartypants@^2.1.2:
     retext-smartypants "^3.0.0"
     unist-util-visit "^1.3.0"
 
-gatsby-source-filesystem@^2.1.6:
-  version "2.1.6"
-  resolved "https://registry.yarnpkg.com/gatsby-source-filesystem/-/gatsby-source-filesystem-2.1.6.tgz#ced6b7b9d02a74849ef2f5dce8d501839cd66e54"
+gatsby-source-filesystem@^2.1.8:
+  version "2.1.8"
+  resolved "https://registry.yarnpkg.com/gatsby-source-filesystem/-/gatsby-source-filesystem-2.1.8.tgz#a31cb5992c60c0a16fe32ff087f35eeff7848962"
+  integrity sha512-/EhMIlp6LA09+zzNkkhSW/zmJON9Ma9HQ5NpGTop7RVf9RIWiqhLA3klqVAnOwcYo2ALvAenGdGX2pgfH4PiMw==
   dependencies:
     "@babel/runtime" "^7.0.0"
     better-queue "^3.8.7"
@@ -5915,9 +5922,10 @@ gatsby-source-filesystem@^2.1.6:
     valid-url "^1.0.9"
     xstate "^3.1.0"
 
-gatsby-telemetry@^1.1.7:
-  version "1.1.7"
-  resolved "https://registry.yarnpkg.com/gatsby-telemetry/-/gatsby-telemetry-1.1.7.tgz#dd2a363852ce87990249586e75189e7b05d1f561"
+gatsby-telemetry@^1.1.11:
+  version "1.1.11"
+  resolved "https://registry.yarnpkg.com/gatsby-telemetry/-/gatsby-telemetry-1.1.11.tgz#7c98881759fa8f61a6bf4f2ee2fb9ac74c6eb592"
+  integrity sha512-pEsDQCHSID0HWj9gzDjkA0Y07j9ItpQ9vYdHsyYeNvwan+L6dI6r2AfSM/gfGL0FHyj14JGixxNChAG1N36Utw==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     "@babel/runtime" "^7.0.0"
@@ -5975,9 +5983,10 @@ gatsby-transformer-sharp@^2.2.5:
     semver "^5.6.0"
     sharp "^0.22.1"
 
-gatsby@^2.13.44:
-  version "2.13.44"
-  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.13.44.tgz#37782acb3dab87f090d89367b9cba756853b8f7e"
+gatsby@^2.13.50:
+  version "2.13.50"
+  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.13.50.tgz#6556a6739fa4d9662d69e72e30a5bea180945158"
+  integrity sha512-30e9L6QcsOiQ04/gjH74IM6rsOEgXJGcKCNDEXTxTqiUpVIELZHy3+8lJLhDlGNxunL4GYI9vqq7k8NleKTAlA==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     "@babel/core" "^7.0.0"
@@ -6035,13 +6044,13 @@ gatsby@^2.13.44:
     flat "^4.0.0"
     fs-exists-cached "1.0.0"
     fs-extra "^5.0.0"
-    gatsby-cli "^2.7.21"
+    gatsby-cli "^2.7.26"
     gatsby-core-utils "^1.0.3"
     gatsby-graphiql-explorer "^0.2.3"
     gatsby-link "^2.2.4"
     gatsby-plugin-page-creator "^2.1.5"
     gatsby-react-router-scroll "^2.1.3"
-    gatsby-telemetry "^1.1.7"
+    gatsby-telemetry "^1.1.11"
     glob "^7.1.1"
     got "8.0.0"
     graphql "^14.1.1"