diff --git a/static/js/blueslip.ts b/static/js/blueslip.ts
index 59cbd8f159..091f935571 100644
--- a/static/js/blueslip.ts
+++ b/static/js/blueslip.ts
@@ -165,7 +165,7 @@ function report_error(
 }
 
 class BlueslipError extends Error {
-    name = "BlueslipError";
+    override name = "BlueslipError";
     more_info?: unknown;
     constructor(msg: string, more_info?: unknown) {
         super(msg);
diff --git a/tsconfig.json b/tsconfig.json
index e563acaaf1..899814ff02 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -24,6 +24,7 @@
         "strict": true,
         "forceConsistentCasingInFileNames": true,
         "isolatedModules": true,
+        "noImplicitOverride": true,
 
         /* Additional checks */
         "noUnusedLocals": true,