diff --git a/package.json b/package.json
index 344f326ee..32efe98f9 100644
--- a/package.json
+++ b/package.json
@@ -24,9 +24,9 @@
     "esutils": "2.0.2",
     "flow-parser": "0.51.0",
     "get-stream": "3.0.0",
-    "globby": "^6.1.0",
+    "globby": "6.1.0",
     "graphql": "0.10.1",
-    "ignore": "^3.3.3",
+    "ignore": "3.3.5",
     "jest-docblock": "21.1.0",
     "jest-validate": "21.1.0",
     "leven": "2.1.0",
@@ -34,7 +34,7 @@
     "minimatch": "3.0.4",
     "minimist": "1.2.0",
     "parse5": "3.0.2",
-    "postcss-less": "^1.0.0",
+    "postcss-less": "1.1.1",
     "postcss-media-query-parser": "0.2.3",
     "postcss-scss": "1.0.0",
     "postcss-selector-parser": "2.2.3",
@@ -55,7 +55,7 @@
     "eslint-plugin-react": "7.1.0",
     "jest": "21.1.0",
     "markdown-toc": "1.1.0",
-    "mkdirp": "^0.5.1",
+    "mkdirp": "0.5.1",
     "prettier": "1.7.3",
     "rimraf": "2.6.1",
     "rollup": "0.41.1",
diff --git a/yarn.lock b/yarn.lock
index b0f50f4b4..776de3ab5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1732,6 +1732,16 @@ globals@^9.0.0, globals@^9.17.0:
   version "9.18.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
 
+globby@6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-6.1.0.tgz#f5a6d70e8395e21c858fb0489d64df02424d506c"
+  dependencies:
+    array-union "^1.0.1"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
 globby@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/globby/-/globby-5.0.0.tgz#ebd84667ca0dbb330b99bcfc68eac2bc54370e0d"
@@ -1743,16 +1753,6 @@ globby@^5.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-globby@^6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/globby/-/globby-6.1.0.tgz#f5a6d70e8395e21c858fb0489d64df02424d506c"
-  dependencies:
-    array-union "^1.0.1"
-    glob "^7.0.3"
-    object-assign "^4.0.1"
-    pify "^2.0.0"
-    pinkie-promise "^2.0.0"
-
 graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
@@ -1909,6 +1909,10 @@ ieee754@^1.1.4:
   version "1.1.8"
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.8.tgz#be33d40ac10ef1926701f6f08a2d86fbfd1ad3e4"
 
+ignore@3.3.5:
+  version "3.3.5"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.5.tgz#c4e715455f6073a8d7e5dae72d2fc9d71663dba6"
+
 ignore@^3.3.3:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.3.tgz#432352e57accd87ab3110e82d3fea0e47812156d"
@@ -2445,8 +2449,8 @@ jest@21.1.0:
     jest-cli "^21.1.0"
 
 js-base64@^2.1.9:
-  version "2.1.9"
-  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.1.9.tgz#f0e80ae039a4bd654b5f281fc93f04a914a7fcce"
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.3.2.tgz#a79a923666372b580f8e27f51845c6f7e8fbfbaf"
 
 js-tokens@^3.0.0:
   version "3.0.1"
@@ -2788,7 +2792,7 @@ mixin-deep@^1.1.3:
     for-in "^1.0.2"
     is-extendable "^0.1.1"
 
-"mkdirp@>=0.5 0", mkdirp@^0.5.1, mkdirp@~0.5.0:
+mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.1, mkdirp@~0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
@@ -3157,9 +3161,9 @@ pluralize@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-4.0.0.tgz#59b708c1c0190a2f692f1c7618c446b052fd1762"
 
-postcss-less@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-less/-/postcss-less-1.0.2.tgz#0efcededf25827552d6757638a4a317aa8ca3ade"
+postcss-less@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/postcss-less/-/postcss-less-1.1.1.tgz#4bd240db517ce3407583d927858184f50045f4ab"
   dependencies:
     postcss "^5.2.16"