diff --git a/.yarn/versions/b3ee5c53.yml b/.yarn/versions/b3ee5c53.yml
new file mode 100644
index 000000000000..c102b820e303
--- /dev/null
+++ b/.yarn/versions/b3ee5c53.yml
@@ -0,0 +1,9 @@
+releases:
+  "@yarnpkg/pnp": patch
+
+declined:
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"
diff --git a/packages/yarnpkg-pnp/sources/esm-loader/loaderUtils.ts b/packages/yarnpkg-pnp/sources/esm-loader/loaderUtils.ts
index cdea66901092..ac28528ae867 100644
--- a/packages/yarnpkg-pnp/sources/esm-loader/loaderUtils.ts
+++ b/packages/yarnpkg-pnp/sources/esm-loader/loaderUtils.ts
@@ -36,6 +36,9 @@ export function getFileFormat(filepath: string): string | null {
     case `.mjs`: {
       return `module`;
     }
+    case `.mts`: {
+      return `module`;
+    }
     case `.cjs`: {
       return `commonjs`;
     }