diff --git a/.changeset/slimy-months-roll.md b/.changeset/slimy-months-roll.md
new file mode 100644
index 0000000..015f81c
--- /dev/null
+++ b/.changeset/slimy-months-roll.md
@@ -0,0 +1,6 @@
+---
+'@thewuh/wallet-standard-wallet-adapter-svelte': patch
+'@thewuh/wallet-adapter-svelte-core': patch
+---
+
+Fix: Sourcemap missing reference files
diff --git a/packages/core/package.json b/packages/core/package.json
index 5717ac3..ca03a4b 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -14,10 +14,10 @@
     "type": "module",
     "sideEffects": false,
     "main": "dist/cjs/index.js",
-    "module": "dist/esm/index.mjs",
+    "module": "dist/esm/index.js",
     "types": "dist/esm/index.d.ts",
     "exports": {
-        "import": "./dist/esm/index.mjs",
+        "import": "./dist/esm/index.js",
         "require": "./dist/cjs/index.js",
         "types": "./dist/esm/index.d.ts"
     },
@@ -30,7 +30,7 @@
     },
     "scripts": {
         "clean": "shx rm -rf dist/*",
-        "build": "pnpm clean && tsc -p tsconfig.json; tsc-esm -p tsconfig.json && tsc -p tsconfig.cjs.json",
+        "build": "pnpm clean && tsc -p tsconfig.json; tsc -p tsconfig.json && tsc -p tsconfig.cjs.json",
         "postbuild": "echo '{\"type\":\"commonjs\"}' | npx json > dist/cjs/package.json && echo '{\"type\":\"module\"} ' | npx json > dist/esm/package.json"
     },
     "peerDependencies": {
diff --git a/packages/core/src/walletStore.ts b/packages/core/src/walletStore.ts
index 5efe9c0..5b8e72c 100644
--- a/packages/core/src/walletStore.ts
+++ b/packages/core/src/walletStore.ts
@@ -11,7 +11,7 @@ import type {
     WalletName,
 } from '@solana/wallet-adapter-base';
 import { WalletNotConnectedError, WalletNotReadyError, WalletReadyState } from '@solana/wallet-adapter-base';
-import { Connection, PublicKey, Transaction, TransactionSignature, VersionedTransaction } from '@solana/web3.js';
+import type { Connection, PublicKey, Transaction, TransactionSignature, VersionedTransaction } from '@solana/web3.js';
 import { get, writable } from 'svelte/store';
 import { WalletNotSelectedError } from './errors.js';
 import { getLocalStorage, setLocalStorage } from './localStorage.js';
diff --git a/packages/standard/package.json b/packages/standard/package.json
index 6b91865..b0b2b01 100644
--- a/packages/standard/package.json
+++ b/packages/standard/package.json
@@ -11,10 +11,10 @@
     "type": "module",
     "sideEffects": false,
     "main": "dist/cjs/index.js",
-    "module": "dist/esm/index.mjs",
+    "module": "dist/esm/index.js",
     "types": "dist/esm/index.d.ts",
     "exports": {
-        "import": "./dist/esm/index.mjs",
+        "import": "./dist/esm/index.js",
         "require": "./dist/cjs/index.js",
         "types": "./dist/esm/index.d.ts"
     },
@@ -27,7 +27,7 @@
     },
     "scripts": {
         "clean": "shx rm -rf dist/*",
-        "build": "pnpm clean && tsc -p tsconfig.json; tsc-esm -p tsconfig.json && tsc -p tsconfig.cjs.json",
+        "build": "pnpm clean && tsc -p tsconfig.json; tsc -p tsconfig.json && tsc -p tsconfig.cjs.json",
         "postbuild": "echo '{\"type\":\"commonjs\"}' | npx json > dist/cjs/package.json && echo '{\"type\":\"module\"} ' | npx json > dist/esm/package.json"
     },
     "peerDependencies": {