diff --git a/package-lock.json b/package-lock.json
index 6150a1a2..92ccadc2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "tortilla",
-  "version": "0.0.1-alpha.26",
+  "version": "0.0.1-alpha.28",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 48b4984d..515e9150 100644
--- a/package.json
+++ b/package.json
@@ -28,8 +28,8 @@
   "devDependencies": {
     "babel-register": "6.26.0",
     "chai": "3.5.0",
-    "chai-match": "^1.1.1",
-    "escape-string-regexp": "^1.0.5",
+    "chai-match": "1.1.1",
+    "escape-string-regexp": "1.0.5",
     "eslint": "3.19.0",
     "eslint-config-airbnb-base": "11.3.2",
     "eslint-plugin-import": "2.8.0",
diff --git a/yarn.lock b/yarn.lock
index f0b7f51e..70d656d0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -289,6 +289,10 @@ center-align@^0.1.1:
     align-text "^0.1.3"
     lazy-cache "^1.0.3"
 
+chai-match@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/chai-match/-/chai-match-1.1.1.tgz#39fb0a2e6b7c8f6386dcfead48d148a915fa6c46"
+
 chai@3.5.0:
   version "3.5.0"
   resolved "https://registry.yarnpkg.com/chai/-/chai-3.5.0.tgz#4d02637b067fe958bdbfdd3a40ec56fef7373247"