diff --git a/package.json b/package.json
index eed5162..321c79d 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "gatsby-transformer-remark": "^2.6.21",
     "gatsby-transformer-sharp": "^2.2.13",
     "lodash": "^4.17.19",
-    "node-sass": "^4.12.0",
+    "node-sass": "^4.13.1",
     "prismjs": "^1.21.0",
     "react": "^16.9.0",
     "react-disqus-comments": "^1.4.0",
diff --git a/yarn.lock b/yarn.lock
index 32296e2..67fc323 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9347,12 +9347,7 @@ lodash.without@^4.4.0:
   resolved "https://registry.npmjs.org/lodash.without/-/lodash.without-4.4.0.tgz#3cd4574a00b67bae373a94b748772640507b7aac"
   integrity sha1-PNRXSgC2e643OpS3SHcmQFB7eqw=
 
-lodash@^4.0.0, lodash@^4.15.0, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.3.0, lodash@~4.17.10:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
-
-lodash@^4.17.10, lodash@^4.17.20:
+lodash@^4.0.0, lodash@^4.15.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.3.0, lodash@~4.17.10:
   version "4.17.20"
   resolved "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
   integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
@@ -9953,14 +9948,14 @@ mixin-deep@^1.2.0:
     for-in "^1.0.2"
     is-extendable "^1.0.1"
 
-mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.1:
+mkdirp@0.5.1:
   version "0.5.1"
   resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   integrity sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=
   dependencies:
     minimist "0.0.8"
 
-mkdirp@^0.5.3, mkdirp@^0.5.5:
+"mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@^0.5.3, mkdirp@^0.5.5, mkdirp@~0.5.1:
   version "0.5.5"
   resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
   integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
@@ -10231,10 +10226,10 @@ node-releases@^1.1.69:
   resolved "https://registry.npmjs.org/node-releases/-/node-releases-1.1.69.tgz#3149dbde53b781610cd8b486d62d86e26c3725f6"
   integrity sha512-DGIjo79VDEyAnRlfSqYTsy+yoHd2IOjJiKUozD2MV2D85Vso6Bug56mb9tT/fY5Urt0iqk01H7x+llAruDR2zA==
 
-node-sass@^4.12.0:
-  version "4.13.0"
-  resolved "https://registry.npmjs.org/node-sass/-/node-sass-4.13.0.tgz#b647288babdd6a1cb726de4545516b31f90da066"
-  integrity sha512-W1XBrvoJ1dy7VsvTAS5q1V45lREbTlZQqFbiHb3R3OTTCma0XBtuG6xZ6Z4506nR4lmHPTqVRwxT6KgtWC97CA==
+node-sass@^4.13.1:
+  version "4.13.1"
+  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-4.13.1.tgz#9db5689696bb2eec2c32b98bfea4c7a2e992d0a3"
+  integrity sha512-TTWFx+ZhyDx1Biiez2nB0L3YrCZ/8oHagaDalbuBSlqXgUPsdkUSzJsVxeDO9LtPB49+Fh3WQl3slABo6AotNw==
   dependencies:
     async-foreach "^0.1.3"
     chalk "^1.1.1"