diff --git a/client/src/extension.ts b/client/src/extension.ts
index 779a2447..a56e63ac 100644
--- a/client/src/extension.ts
+++ b/client/src/extension.ts
@@ -108,7 +108,7 @@ export async function activate(context: ExtensionContext) {
 
   languageClient.onNotification("cfn/cfnLintUpgradeNeeded", (params) => {
     window.showInformationMessage(
-      `You are using an outdated version of cfn-lint (${params["cli_version"]}). The latest version is ${params["latest_version"]}.`
+      `You are using an outdated version of cfn-lint (${params["cliVersion"]}). The latest version is ${params["latestVersion"]}.`
     );
   });
 
diff --git a/server/src/server/handlers/notificationHandler.ts b/server/src/server/handlers/notificationHandler.ts
index 5fe8f469..ec2f2367 100644
--- a/server/src/server/handlers/notificationHandler.ts
+++ b/server/src/server/handlers/notificationHandler.ts
@@ -73,8 +73,8 @@ export class NotificationHandler {
           try {
             if (gt(latestVersion, cliVersion)) {
               this.connection.sendNotification("cfn/cfnLintUpgradeNeeded", {
-                cli_version: cliVersion,
-                latest_version: latestVersion,
+                cliVersion: cliVersion,
+                latestVersion: latestVersion,
               });
             }
           } catch (error) {