diff --git a/ui/.nvmrc b/ui/.nvmrc
index 2dc0523..ad8f873 100644
--- a/ui/.nvmrc
+++ b/ui/.nvmrc
@@ -1 +1 @@
-v8.6.0
+v8.9.1
diff --git a/ui/src/lib/RegexBuilder.js b/ui/src/lib/RegexBuilder.js
index 5e96bf1..407d50d 100644
--- a/ui/src/lib/RegexBuilder.js
+++ b/ui/src/lib/RegexBuilder.js
@@ -45,5 +45,9 @@ export default class RegexBuilder {
       );
   }
 
-  getFlag() {}
+  getFlag() {
+    return Object.keys(REGEX_FLAGS)
+      .filter(key => this.flags[key])
+      .reduce((acc, cValue) => acc | REGEX_FLAGS[cValue], 0);
+  }
 }