diff --git a/package.json b/package.json
index ef135f1f69..02e0e8fcd1 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "chalk": "^2.0.1",
     "codecov": "^2.2.0",
     "console-group": "^0.3.2",
-    "css-tree": "1.0.0-alpha16",
+    "css-tree": "1.0.0-alpha22",
     "eslint": "^4.3.0",
     "eslint-plugin-html": "^3.0.0",
     "eslint-plugin-import": "^2.2.0",
diff --git a/src/css/Selector.ts b/src/css/Selector.ts
index 57fcb837e8..85922c017b 100644
--- a/src/css/Selector.ts
+++ b/src/css/Selector.ts
@@ -160,7 +160,7 @@ function applySelector(blocks: Block[], node: Node, stack: Node[], toEncapsulate
 		}
 
 		else if (selector.type === 'AttributeSelector') {
-			if (!attributeMatches(node, selector.name.name, selector.value && unquote(selector.value), selector.operator, selector.flags)) return false;
+			if (!attributeMatches(node, selector.name.name, selector.value && unquote(selector.value), selector.matcher, selector.flags)) return false;
 		}
 
 		else if (selector.type === 'TypeSelector') {
@@ -299,4 +299,4 @@ function groupSelectors(selector: Node) {
 	});
 
 	return blocks;
-}
\ No newline at end of file
+}
diff --git a/yarn.lock b/yarn.lock
index 670e44209c..8665811010 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -557,10 +557,11 @@ cryptiles@2.x.x:
   dependencies:
     boom "2.x.x"
 
-css-tree@1.0.0-alpha16:
-  version "1.0.0-alpha16"
-  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha16.tgz#6cb2cdff6947259dfdaf790626333a862de948b0"
+css-tree@1.0.0-alpha22:
+  version "1.0.0-alpha22"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha22.tgz#338a006e331c7b4f9dab7b6af539ece56ff78af2"
   dependencies:
+    mdn-data "^1.0.0"
     source-map "^0.5.3"
 
 cssom@0.3.x, "cssom@>= 0.3.2 < 0.4.0":
@@ -1691,6 +1692,10 @@ md5-o-matic@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/md5-o-matic/-/md5-o-matic-0.1.1.tgz#822bccd65e117c514fab176b25945d54100a03c3"
 
+mdn-data@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-1.0.0.tgz#a69d9da76847b4d5834c1465ea25c0653a1fbf66"
+
 mem@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/mem/-/mem-1.1.0.tgz#5edd52b485ca1d900fe64895505399a0dfa45f76"