diff --git a/spec/parser/javascript/root_spec.js b/spec/parser/javascript/root_spec.js
index a7dd1ec..7ec1878 100644
--- a/spec/parser/javascript/root_spec.js
+++ b/spec/parser/javascript/root_spec.js
@@ -25,6 +25,14 @@ describe('parser/javascript/root.js', function() {
       flags: ['Multiline'],
       regexp: jasmine.objectContaining({ textValue: 'test' })
     },
+    '/test/y': {
+      flags: ['Sticky'],
+      regexp: jasmine.objectContaining({ textValue: 'test' })
+    },
+    '/test/u': {
+      flags: ['Unicode'],
+      regexp: jasmine.objectContaining({ textValue: 'test' })
+    },
     '/test/mgi': {
       flags: ['Global', 'Ignore Case', 'Multiline'],
       regexp: jasmine.objectContaining({ textValue: 'test' })
diff --git a/src/js/parser/javascript/grammar.peg b/src/js/parser/javascript/grammar.peg
index 37ef9d5..cdc84c7 100644
--- a/src/js/parser/javascript/grammar.peg
+++ b/src/js/parser/javascript/grammar.peg
@@ -1,5 +1,5 @@
 grammar JavascriptRegexp
-  root <- ( ( "/" regexp "/" flags:[igm]* ) / regexp flags:""? ) <Root>
+  root <- ( ( "/" regexp "/" flags:[yigmu]* ) / regexp flags:""? ) <Root>
   regexp <- match:match alternates:( "|" match )* <Regexp>
   match <- (!repeat) parts:match_fragment* <Match>
   anchor <- ( "^" / "$" ) <Anchor>
diff --git a/src/js/parser/javascript/root.js b/src/js/parser/javascript/root.js
index cc6c89c..1756100 100644
--- a/src/js/parser/javascript/root.js
+++ b/src/js/parser/javascript/root.js
@@ -9,7 +9,9 @@ export default {
   flagLabels: {
     i: 'Ignore Case',
     g: 'Global',
-    m: 'Multiline'
+    m: 'Multiline',
+    y: 'Sticky',
+    u: 'Unicode'
   },
 
   // Renders the root into the currently set container.