diff --git a/extensions/CONTRIBUTING.md b/extensions/CONTRIBUTING.md
index 5a197670f15..5a2f4c83012 100644
--- a/extensions/CONTRIBUTING.md
+++ b/extensions/CONTRIBUTING.md
@@ -9,7 +9,7 @@ A typical TypeScript-based built-in extension has the following structure:
 - `package.json`: extension manifest.
 - `src/`: Main directory for TypeScript source code.
 - `tsconfig.json`: primary TypeScript config. This should inherit from `tsconfig.base.json`.
-- `esbuild.mts`: Esbuild build script used for production builds.
+- `esbuild.mts`: esbuild build script used for production builds.
 - `.vscodeignore`: Ignore file list. You can copy this from an existing extension.
 
 TypeScript-based extensions have the following output structure: