diff --git a/lib/parse.js b/lib/parse.js
index 4d2f11c..bce9f62 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -172,7 +172,7 @@ CSSOM.parse = function parse(token) {
 					i += matchKeyframes[0].length - 1;
 					buffer = "";
 					break;
-				} else if (state == "selector") {
+				} else if (state === "selector") {
 					state = "atRule";
 				}
 			}
@@ -240,7 +240,7 @@ CSSOM.parse = function parse(token) {
 		case '(':
 			if (state === 'value') {
 				// ie css expression mode
-				if (buffer.trim() == 'expression') {
+				if (buffer.trim() === 'expression') {
 					var info = (new CSSOM.CSSValueExpression(token, i)).parse();
 
 					if (info.error) {