diff --git a/lib/harAnalyzer.js b/lib/harAnalyzer.js
index e2d179f..706436e 100644
--- a/lib/harAnalyzer.js
+++ b/lib/harAnalyzer.js
@@ -122,28 +122,32 @@ export class HarAnalyzer {
             const lintPromises = analyzedData['all-scripts'].flatMap(entry => [
                 this.eslintSecurity.lintText(entry.content).then(results => {
                     return results.flatMap(result =>
-                        result.messages.map(message => ({
-                            url: entry.url,
-                            rule: message.ruleId,
-                            category: 'security',
-                            severity: message.severity === 1 ? "warning" : message.severity === 2 ? "error" : message.severity,
-                            text: message.message,
-                            line: message.line,
-                            column: message.column
-                        }))
+                        result.messages
+                            .filter(message => message.ruleId !== null) // Ignore messages with null ruleId
+                            .map(message => ({
+                                url: entry.url,
+                                rule: message.ruleId,
+                                category: 'security',
+                                severity: message.severity === 1 ? "warning" : message.severity === 2 ? "error" : message.severity,
+                                text: message.message,
+                                line: message.line,
+                                column: message.column
+                            }))
                     );
                 }),
                 this.eslintStandard.lintText(entry.content).then(results => {
                     return results.flatMap(result =>
-                        result.messages.map(message => ({
-                            url: entry.url,
-                            rule: message.ruleId,
-                            category: 'standard',
-                            severity: message.severity === 1 ? "warning" : message.severity === 2 ? "error" : message.severity,
-                            text: message.message,
-                            line: message.line,
-                            column: message.column
-                        }))
+                        result.messages
+                            .filter(message => message.ruleId !== null) // Ignore messages with null ruleId
+                            .map(message => ({
+                                url: entry.url,
+                                rule: message.ruleId,
+                                category: 'standard',
+                                severity: message.severity === 1 ? "warning" : message.severity === 2 ? "error" : message.severity,
+                                text: message.message,
+                                line: message.line,
+                                column: message.column
+                            }))
                     );
                 })
             ]);