diff --git a/Build/lib/rules/base.ts b/Build/lib/rules/base.ts
index 14eba660..fbc6c639 100644
--- a/Build/lib/rules/base.ts
+++ b/Build/lib/rules/base.ts
@@ -201,7 +201,7 @@ export class FileOutput {
       }
 
       const splitted = line.split(',');
-      const type = splitted[0];
+      const type = splitted[0].toUpperCase();
       const value = splitted[1];
       const arg = splitted[2];
 
diff --git a/Build/lib/run-against-source-file.ts b/Build/lib/run-against-source-file.ts
index 6ae6d0d8..520212d4 100644
--- a/Build/lib/run-against-source-file.ts
+++ b/Build/lib/run-against-source-file.ts
@@ -31,7 +31,7 @@ export default async function runAgainstSourceFile(
 
     if (type === 'ruleset') {
       const [ruleType, domain] = l.split(',', 3);
-      switch (ruleType) {
+      switch (ruleType.toUpperCase()) {
         case 'DOMAIN': {
           callback(domain, false);
           break;