diff --git a/ExpressAPI/.idea/.gitignore b/ExpressAPI/.idea/.gitignore
index 13566b81b018ad684f3a35fee301741b2734c8f4..a9d7db9c0a81b2db47ca92e4e180b30090b27632 100644
--- a/ExpressAPI/.idea/.gitignore
+++ b/ExpressAPI/.idea/.gitignore
@@ -6,3 +6,5 @@
 # Datasource local storage ignored files
 /dataSources/
 /dataSources.local.xml
+# GitHub Copilot persisted chat sessions
+/copilot/chatSessions