diff --git a/package.json b/package.json
index e3388942..9c2c7275 100644
--- a/package.json
+++ b/package.json
@@ -10,9 +10,10 @@
   "license": "MIT",
   "private": false,
   "exports": {
-    "./_shims/*.mjs": {
+    "./_shims/*": {
       "deno": {
         "types": "./dist/_shims/*.d.ts",
+        "require": "./dist/_shims/*.js",
         "default": "./dist/_shims/*.mjs"
       },
       "bun": {
@@ -22,47 +23,28 @@
       },
       "browser": {
         "types": "./dist/_shims/*.d.ts",
+        "require": "./dist/_shims/*.js",
         "default": "./dist/_shims/*.mjs"
       },
       "worker": {
         "types": "./dist/_shims/*.d.ts",
+        "require": "./dist/_shims/*.js",
         "default": "./dist/_shims/*.mjs"
       },
       "workerd": {
         "types": "./dist/_shims/*.d.ts",
+        "require": "./dist/_shims/*.js",
         "default": "./dist/_shims/*.mjs"
       },
       "node": {
         "types": "./dist/_shims/*-node.d.ts",
+        "require": "./dist/_shims/*-node.js",
         "default": "./dist/_shims/*-node.mjs"
       },
       "types": "./dist/_shims/*.d.ts",
+      "require": "./dist/_shims/*.js",
       "default": "./dist/_shims/*.mjs"
     },
-    "./_shims/*.js": {
-      "deno": {
-        "types": "./dist/_shims/*.d.ts",
-        "default": "./dist/_shims/*.js"
-      },
-      "browser": {
-        "types": "./dist/_shims/*.d.ts",
-        "default": "./dist/_shims/*.js"
-      },
-      "worker": {
-        "types": "./dist/_shims/*.d.ts",
-        "default": "./dist/_shims/*.js"
-      },
-      "workerd": {
-        "types": "./dist/_shims/*.d.ts",
-        "default": "./dist/_shims/*.js"
-      },
-      "node": {
-        "types": "./dist/_shims/*-node.d.ts",
-        "default": "./dist/_shims/*-node.js"
-      },
-      "types": "./dist/_shims/*.d.ts",
-      "default": "./dist/_shims/*.js"
-    },
     ".": {
       "require": {
         "types": "./dist/index.d.ts",
diff --git a/scripts/replace-self-referencing-imports.js b/scripts/replace-self-referencing-imports.js
index d4e63ade..1b77a588 100644
--- a/scripts/replace-self-referencing-imports.js
+++ b/scripts/replace-self-referencing-imports.js
@@ -12,11 +12,7 @@ function replaceSelfReferencingImports({ orig, file, config }) {
 
   return orig.replace(/['"]([^"'\r\n]+)['"]/, (match, importPath) => {
     if (!importPath.startsWith('@anthropic-ai/sdk/')) return match;
-    if (!file.startsWith(distSrcDir)) {
-      const ext = file.endsWith('.d.ts') ? '' : path.extname(file);
-      const { dir, base } = path.parse(importPath);
-      return JSON.stringify(`${dir}/${base}${ext}`);
-    }
+    if (!file.startsWith(distSrcDir)) return match;
     let relativePath = path.relative(
       path.dirname(file),
       path.join(distSrcDir, importPath.substring('@anthropic-ai/sdk/'.length)),