diff --git a/frontend/nyaysetu-frontend/src/pages/lawyer/CaseWorkspace.jsx b/frontend/nyaysetu-frontend/src/pages/lawyer/CaseWorkspace.jsx
index ca0d4c278..ca12b2865 100644
--- a/frontend/nyaysetu-frontend/src/pages/lawyer/CaseWorkspace.jsx
+++ b/frontend/nyaysetu-frontend/src/pages/lawyer/CaseWorkspace.jsx
@@ -423,7 +423,7 @@ function TabEvidence({ caseId }) {
                     <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(300px, 1fr))', gap: '1.5rem' }}>
                         {documents.map(doc => {
                             const dateStr = doc.uploadDate || doc.createdAt || new Date().toISOString();
-                            const isValidDate = !isNaN(new Date(dateStr).getTime());
+                            const isValidDate = !Number.isNaN(new Date(dateStr).getTime());
 
                             return (
                                 <div key={doc.id} style={{