diff --git a/package-lock.json b/package-lock.json
index bba74ab..6a359c9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -65,14 +65,6 @@
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
-    "debug": {
-      "version": "3.2.6",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
-      "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
-      "requires": {
-        "ms": "^2.1.1"
-      }
-    },
     "duplexer2": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
@@ -82,12 +74,9 @@
       }
     },
     "follow-redirects": {
-      "version": "1.11.0",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.11.0.tgz",
-      "integrity": "sha512-KZm0V+ll8PfBrKwMzdo5D13b1bur9Iq9Zd/RMmAoQQcl2PxxFml8cxXPaaPYVbV0RjNjq1CU7zIzAOqtUPudmA==",
-      "requires": {
-        "debug": "^3.0.0"
-      }
+      "version": "1.14.8",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.8.tgz",
+      "integrity": "sha512-1x0S9UVJHsQprFcEC/qnNzBLcIxsjAV905f/UkQxbclCsoTWlacCNOpQa/anodLl2uaEKFhfWOvM2Qg77+15zA=="
     },
     "fs-extra": {
       "version": "6.0.1",
@@ -186,11 +175,6 @@
         "minimist": "^1.2.5"
       }
     },
-    "ms": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
-    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
diff --git a/package.json b/package.json
index 12818d9..a72e975 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "start": "docfx docfx_project/docfx.json --serve"
   },
   "dependencies": {
-    "follow-redirects": "^1.11.0",
+    "follow-redirects": "^1.14.8",
     "fs-extra": "^6.0.1",
     "q": "^1.5.1",
     "unzipper": "^0.10.10"
diff --git a/yarn.lock b/yarn.lock
index 1637ebd..3ac4c48 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -50,23 +50,15 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-debug@^3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
-  dependencies:
-    ms "2.0.0"
-
 duplexer2@~0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/duplexer2/-/duplexer2-0.1.4.tgz#8b12dab878c0d69e3e7891051662a32fc6bddcc1"
   dependencies:
     readable-stream "^2.0.2"
 
-follow-redirects@^1.5.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.0.tgz#234f49cf770b7f35b40e790f636ceba0c3a0ab77"
-  dependencies:
-    debug "^3.1.0"
+follow-redirects@^1.14.8:
+  version "1.14.8"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.8.tgz#016996fb9a11a100566398b1c6839337d7bfa8fc"
 
 fs-extra@^6.0.1:
   version "6.0.1"
@@ -80,9 +72,9 @@ fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
-fstream@~1.0.10:
-  version "1.0.11"
-  resolved "https://registry.yarnpkg.com/fstream/-/fstream-1.0.11.tgz#5c1fb1f117477114f0632a0eb4b71b3cb0fd3171"
+fstream@^1.0.12:
+  version "1.0.12"
+  resolved "https://registry.yarnpkg.com/fstream/-/fstream-1.0.12.tgz#4e8ba8ee2d48be4f7d0de505455548eae5932045"
   dependencies:
     graceful-fs "^4.1.2"
     inherits "~2.0.0"
@@ -104,6 +96,10 @@ graceful-fs@^4.1.2, graceful-fs@^4.1.6:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
+graceful-fs@^4.2.2:
+  version "4.2.9"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.9.tgz#041b05df45755e587a24942279b9d113146e1c96"
+
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -145,10 +141,6 @@ minimist@0.0.8:
   dependencies:
     minimist "0.0.8"
 
-ms@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
-
 once@^1.3.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
@@ -207,16 +199,17 @@ universalify@^0.1.0:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"
 
-unzipper@^0.9.0:
-  version "0.9.0"
-  resolved "https://registry.yarnpkg.com/unzipper/-/unzipper-0.9.0.tgz#4c61e339f42b64da53db045ae32a539d1b5ba2ec"
+unzipper@^0.10.10:
+  version "0.10.11"
+  resolved "https://registry.yarnpkg.com/unzipper/-/unzipper-0.10.11.tgz#0b4991446472cbdb92ee7403909f26c2419c782e"
   dependencies:
     big-integer "^1.6.17"
     binary "~0.3.0"
     bluebird "~3.4.1"
     buffer-indexof-polyfill "~1.0.0"
     duplexer2 "~0.1.4"
-    fstream "~1.0.10"
+    fstream "^1.0.12"
+    graceful-fs "^4.2.2"
     listenercount "~1.0.1"
     readable-stream "~2.3.6"
     setimmediate "~1.0.4"