diff --git a/package.json b/package.json
index f4871d3..0cebb8a 100644
--- a/package.json
+++ b/package.json
@@ -31,15 +31,15 @@
     "yosay": "^2.0.0"
   },
   "devDependencies": {
-    "ava": "^0.18.2",
-    "common-tags": "^1.4.0",
-    "coveralls": "^2.12.0",
-    "eslint": "^3.18.0",
-    "eslint-plugin-ava": "^4.2.0",
-    "fs-extra": "^2.1.2",
-    "nyc": "^10.2.0",
-    "yeoman-assert": "^3.0.0",
-    "yeoman-test": "^1.6.0"
+    "ava": "0.18.2",
+    "common-tags": "1.4.0",
+    "coveralls": "2.12.0",
+    "eslint": "3.18.0",
+    "eslint-plugin-ava": "4.2.0",
+    "fs-extra": "2.1.2",
+    "nyc": "10.2.0",
+    "yeoman-assert": "3.0.0",
+    "yeoman-test": "1.6.0"
   },
   "repository": "skatejs/generator-skatejs",
   "scripts": {
diff --git a/yarn.lock b/yarn.lock
index 0109f8e..c8348c6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -239,7 +239,7 @@ ava-init@^0.2.0:
     read-pkg-up "^2.0.0"
     write-pkg "^2.0.0"
 
-ava@^0.18.2:
+ava@0.18.2:
   version "0.18.2"
   resolved "https://registry.yarnpkg.com/ava/-/ava-0.18.2.tgz#79253d1636077034a2780bb55b5c3e6c3d7f312f"
   dependencies:
@@ -962,7 +962,7 @@ common-path-prefix@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/common-path-prefix/-/common-path-prefix-1.0.0.tgz#cd52f6f0712e0baab97d6f9732874f22f47752c0"
 
-common-tags@^1.4.0:
+common-tags@1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.4.0.tgz#1187be4f3d4cf0c0427d43f74eef1f73501614c0"
   dependencies:
@@ -1025,7 +1025,7 @@ 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"
 
-coveralls@^2.12.0:
+coveralls@2.12.0:
   version "2.12.0"
   resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-2.12.0.tgz#b3d064108e29728385b56e42fc2d119f43e0e517"
   dependencies:
@@ -1388,7 +1388,7 @@ escope@^3.6.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
-eslint-plugin-ava@^4.2.0:
+eslint-plugin-ava@4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/eslint-plugin-ava/-/eslint-plugin-ava-4.2.0.tgz#12e4664659c1fae7895fa3f346c313ceb8907c77"
   dependencies:
@@ -1401,7 +1401,7 @@ eslint-plugin-ava@^4.2.0:
     pkg-up "^1.0.0"
     req-all "^1.0.0"
 
-eslint@^3.18.0:
+eslint@3.18.0:
   version "3.18.0"
   resolved "https://registry.yarnpkg.com/eslint/-/eslint-3.18.0.tgz#647e985c4ae71502d20ac62c109f66d5104c8a4b"
   dependencies:
@@ -1674,7 +1674,7 @@ formatio@1.1.1:
   dependencies:
     samsam "~1.1"
 
-fs-extra@^2.1.2:
+fs-extra@2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-2.1.2.tgz#046c70163cef9aad46b0e4a7fa467fb22d71de35"
   dependencies:
@@ -2854,7 +2854,7 @@ number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
 
-nyc@^10.2.0:
+nyc@10.2.0:
   version "10.2.0"
   resolved "https://registry.yarnpkg.com/nyc/-/nyc-10.2.0.tgz#facd90240600c9aa4dd81ea99c2fb6a85c53de0c"
   dependencies:
@@ -4219,14 +4219,14 @@ yargs@~3.10.0:
     decamelize "^1.0.0"
     window-size "0.1.0"
 
+yeoman-assert@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/yeoman-assert/-/yeoman-assert-3.0.0.tgz#8e52eb657d3f42d90703f94918091aba1cfc263c"
+
 yeoman-assert@^2.0.0:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/yeoman-assert/-/yeoman-assert-2.2.3.tgz#a5682a83632c50ac0ee84173a5a10fd6f3206474"
 
-yeoman-assert@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/yeoman-assert/-/yeoman-assert-3.0.0.tgz#8e52eb657d3f42d90703f94918091aba1cfc263c"
-
 yeoman-environment@^1.1.0, yeoman-environment@^1.5.2:
   version "1.6.6"
   resolved "https://registry.yarnpkg.com/yeoman-environment/-/yeoman-environment-1.6.6.tgz#cd85fa67d156060e440d7807d7ef7cf0d2d1d671"
@@ -4320,7 +4320,7 @@ yeoman-generator@^1.1.1:
     user-home "^2.0.0"
     yeoman-environment "^1.1.0"
 
-yeoman-test@^1.0.0, yeoman-test@^1.6.0:
+yeoman-test@1.6.0, yeoman-test@^1.0.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/yeoman-test/-/yeoman-test-1.6.0.tgz#abff291733e16e8923d9eefc8691c632888bf948"
   dependencies: