diff --git a/packages/gatsby-remark-code-repls/package.json b/packages/gatsby-remark-code-repls/package.json
index 5eacaa3adab5b..ec59622688435 100644
--- a/packages/gatsby-remark-code-repls/package.json
+++ b/packages/gatsby-remark-code-repls/package.json
@@ -10,7 +10,7 @@
     "@babel/runtime": "^7.0.0",
     "lz-string": "^1.4.4",
     "normalize-path": "^2.1.1",
-    "npm-package-arg": "^6.1.0",
+    "npm-package-arg": "^6.1.1",
     "recursive-readdir": "^2.2.2",
     "unist-util-map": "^1.0.5",
     "urijs": "^1.19.1"
diff --git a/packages/gatsby-transformer-excel/package.json b/packages/gatsby-transformer-excel/package.json
index 2298158bba35c..546126fe043ca 100644
--- a/packages/gatsby-transformer-excel/package.json
+++ b/packages/gatsby-transformer-excel/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.0.0",
-    "xlsx": "^0.14.5"
+    "xlsx": "^0.15.1"
   },
   "devDependencies": {
     "@babel/cli": "^7.0.0",
diff --git a/packages/gatsby/package.json b/packages/gatsby/package.json
index 4c9ef3e717a87..6c000b507c2a6 100644
--- a/packages/gatsby/package.json
+++ b/packages/gatsby/package.json
@@ -95,7 +95,7 @@
     "md5-file": "^3.2.3",
     "micromatch": "^3.1.10",
     "mime": "^2.4.4",
-    "mini-css-extract-plugin": "^0.4.5",
+    "mini-css-extract-plugin": "^0.8.0",
     "mitt": "^1.1.3",
     "mkdirp": "^0.5.1",
     "moment": "^2.24.0",
diff --git a/yarn.lock b/yarn.lock
index fbbc354621f73..8668395e023f2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6426,7 +6426,7 @@ ccount@^1.0.0, ccount@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/ccount/-/ccount-1.0.3.tgz#f1cec43f332e2ea5a569fd46f9f5bde4e6102aff"
 
-cfb@^1.1.2:
+cfb@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/cfb/-/cfb-1.1.3.tgz#05de6816259c8e8bc32713aba905608ee385df66"
   integrity sha512-joXBW0nMuwV9no7UTMiyVJnQL6XIU3ThXVjFUDHgl9MpILPOomyfaGqC290VELZ48bbQKZXnQ81UT5HouTxHsw==
@@ -11591,7 +11591,7 @@ hosted-git-info@^2.1.4, hosted-git-info@^2.6.0:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.7.1.tgz#97f236977bd6e125408930ff6de3eec6281ec047"
 
-hosted-git-info@^2.8.4:
+hosted-git-info@^2.7.1, hosted-git-info@^2.8.4:
   version "2.8.4"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.4.tgz#44119abaf4bc64692a16ace34700fed9c03e2546"
   integrity sha512-pzXIvANXEFrc5oFFXRMkbLPQ2rXRoDERwDLyrcUxGhaZhgP54BBSl9Oheh7Vv0T090cszWBxPjkQQ5Sq1PbBRQ==
@@ -15309,15 +15309,6 @@ min-document@^2.19.0:
   dependencies:
     dom-walk "^0.1.0"
 
-mini-css-extract-plugin@^0.4.5:
-  version "0.4.5"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.5.tgz#c99e9e78d54f3fa775633aee5933aeaa4e80719a"
-  integrity sha512-dqBanNfktnp2hwL2YguV9Jh91PFX7gu7nRLs4TGsbAfAG6WOtlynFRYzwDwmmeSb5uIwHo9nx1ta0f7vAZVp2w==
-  dependencies:
-    loader-utils "^1.1.0"
-    schema-utils "^1.0.0"
-    webpack-sources "^1.1.0"
-
 mini-css-extract-plugin@^0.8.0:
   version "0.8.0"
   resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.8.0.tgz#81d41ec4fe58c713a96ad7c723cdb2d0bd4d70e1"
@@ -15996,6 +15987,16 @@ npm-lifecycle@^3.1.2:
     semver "^5.5.0"
     validate-npm-package-name "^3.0.0"
 
+npm-package-arg@^6.1.1:
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/npm-package-arg/-/npm-package-arg-6.1.1.tgz#02168cb0a49a2b75bf988a28698de7b529df5cb7"
+  integrity sha512-qBpssaL3IOZWi5vEKUKW0cO7kzLeT+EQO9W8RsLOZf76KF9E/K9+wH0C7t06HXPpaH8WH5xF1MExLuCwbTqRUg==
+  dependencies:
+    hosted-git-info "^2.7.1"
+    osenv "^0.1.5"
+    semver "^5.6.0"
+    validate-npm-package-name "^3.0.0"
+
 npm-packlist@^1.1.6:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/npm-packlist/-/npm-packlist-1.1.11.tgz#84e8c683cbe7867d34b1d357d893ce29e28a02de"
@@ -22783,13 +22784,13 @@ xhr@^2.0.1:
     parse-headers "^2.0.0"
     xtend "^4.0.0"
 
-xlsx@^0.14.5:
-  version "0.14.5"
-  resolved "https://registry.yarnpkg.com/xlsx/-/xlsx-0.14.5.tgz#3637e914d791bdca7382816e173f7d725ed0e0d2"
-  integrity sha512-s/5f4/mjeWREmIWZ+HtDfh/rnz51ar+dZ4LWKZU3u9VBx2zLdSIWTdXgoa52/pnZ9Oe/Vu1W1qzcKzLVe+lq4w==
+xlsx@^0.15.1:
+  version "0.15.1"
+  resolved "https://registry.yarnpkg.com/xlsx/-/xlsx-0.15.1.tgz#a767c4d412cbd0c95b30dbcd48bed7de428eb107"
+  integrity sha512-z+o4+QPMc32EPboLCzJAz94o0Zyy+8jrmWTsVpfzwknFln9qDO6/HN1KrGGVC4//sGA7dh4R3HA4fhbGIKCDOA==
   dependencies:
     adler-32 "~1.2.0"
-    cfb "^1.1.2"
+    cfb "^1.1.3"
     codepage "~1.14.0"
     commander "~2.17.1"
     crc-32 "~1.2.0"