diff --git a/Tasks/YarnInstaller/package.json b/Tasks/YarnInstaller/package.json
index 92a97e5..f4d5236 100644
--- a/Tasks/YarnInstaller/package.json
+++ b/Tasks/YarnInstaller/package.json
@@ -9,6 +9,6 @@
     "https-proxy-agent": "^2.2.1",
     "ini": "^1.3.5",
     "q": "^1.5.1",
-    "tar": "4.4.9"
+    "tar": "4.4.18"
   }
 }
diff --git a/Tasks/YarnInstaller/yarn.lock b/Tasks/YarnInstaller/yarn.lock
index 0754e2c..eda272b 100644
--- a/Tasks/YarnInstaller/yarn.lock
+++ b/Tasks/YarnInstaller/yarn.lock
@@ -56,9 +56,9 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-chownr@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.1.tgz#54726b8b8fff4df053c42187e801fb4412df1494"
+chownr@^1.1.4:
+  version "1.1.4"
+  resolved "https://www.myget.org/F/gl-unstable/npm/chownr/-/chownr-1.1.4.tgz#6fc9d7b42d32a583596337666e7d08084da2cc6b"
 
 concat-map@0.0.1:
   version "0.0.1"
@@ -88,11 +88,11 @@ fs-extra@8.0.1:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-minipass@^1.2.5:
-  version "1.2.6"
-  resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.6.tgz#2c5cc30ded81282bfe8a0d7c7c1853ddeb102c07"
+fs-minipass@^1.2.7:
+  version "1.2.7"
+  resolved "https://www.myget.org/F/gl-unstable/npm/fs-minipass/-/fs-minipass-1.2.7.tgz#ccff8570841e7fe4265693da88936c55aed7f7c7"
   dependencies:
-    minipass "^2.2.1"
+    minipass "^2.6.0"
 
 graceful-fs@^4.1.2, graceful-fs@^4.1.6:
   version "4.1.15"
@@ -121,28 +121,28 @@ minimatch@3.0.4:
   dependencies:
     brace-expansion "^1.1.7"
 
-minimist@0.0.8:
-  version "0.0.8"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+minimist@^1.2.5:
+  version "1.2.5"
+  resolved "https://www.myget.org/F/gl-unstable/npm/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
 
-minipass@^2.2.1, minipass@^2.3.5:
-  version "2.3.5"
-  resolved "https://registry.yarnpkg.com/minipass/-/minipass-2.3.5.tgz#cacebe492022497f656b0f0f51e2682a9ed2d848"
+minipass@^2.6.0, minipass@^2.9.0:
+  version "2.9.0"
+  resolved "https://www.myget.org/F/gl-unstable/npm/minipass/-/minipass-2.9.0.tgz#e713762e7d3e32fed803115cf93e04bca9fcc9a6"
   dependencies:
     safe-buffer "^5.1.2"
     yallist "^3.0.0"
 
-minizlib@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/minizlib/-/minizlib-1.2.1.tgz#dd27ea6136243c7c880684e8672bb3a45fd9b614"
+minizlib@^1.3.3:
+  version "1.3.3"
+  resolved "https://www.myget.org/F/gl-unstable/npm/minizlib/-/minizlib-1.3.3.tgz#2290de96818a34c29551c8a8d301216bd65a861d"
   dependencies:
-    minipass "^2.2.1"
+    minipass "^2.9.0"
 
-mkdirp@^0.5.0:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+mkdirp@^0.5.5:
+  version "0.5.5"
+  resolved "https://www.myget.org/F/gl-unstable/npm/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
   dependencies:
-    minimist "0.0.8"
+    minimist "^1.2.5"
 
 mockery@^1.7.0:
   version "1.7.0"
@@ -156,9 +156,9 @@ q@^1.1.2, q@^1.5.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"
 
-safe-buffer@^5.1.2:
-  version "5.1.2"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+safe-buffer@^5.1.2, safe-buffer@^5.2.1:
+  version "5.2.1"
+  resolved "https://www.myget.org/F/gl-unstable/npm/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
 
 semver-compare@^1.0.0:
   version "1.0.0"
@@ -172,17 +172,17 @@ shelljs@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.3.0.tgz#3596e6307a781544f591f37da618360f31db57b1"
 
-tar@4.4.9:
-  version "4.4.9"
-  resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.9.tgz#058fbb152f6fc45733e84585a40c39e59302e1b3"
+tar@4.4.18:
+  version "4.4.18"
+  resolved "https://www.myget.org/F/gl-unstable/npm/tar/-/tar-4.4.18.tgz#a565090fdcf786ee08ed14b1739179451b3cc476"
   dependencies:
-    chownr "^1.1.1"
-    fs-minipass "^1.2.5"
-    minipass "^2.3.5"
-    minizlib "^1.2.1"
-    mkdirp "^0.5.0"
-    safe-buffer "^5.1.2"
-    yallist "^3.0.3"
+    chownr "^1.1.4"
+    fs-minipass "^1.2.7"
+    minipass "^2.9.0"
+    minizlib "^1.3.3"
+    mkdirp "^0.5.5"
+    safe-buffer "^5.2.1"
+    yallist "^3.1.1"
 
 tunnel@0.0.4:
   version "0.0.4"
@@ -207,6 +207,6 @@ uuid@^3.0.1:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
 
-yallist@^3.0.0, yallist@^3.0.3:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.3.tgz#b4b049e314be545e3ce802236d6cd22cd91c3de9"
+yallist@^3.0.0, yallist@^3.1.1:
+  version "3.1.1"
+  resolved "https://www.myget.org/F/gl-unstable/npm/yallist/-/yallist-3.1.1.tgz#dbb7daf9bfd8bac9ab45ebf602b8cbad0d5d08fd"