diff --git a/packages/env/package.json b/packages/env/package.json
index a6e6a98..d4256a4 100644
--- a/packages/env/package.json
+++ b/packages/env/package.json
@@ -33,7 +33,7 @@
   "devDependencies": {
     "tsx": "^4.19.2",
     "@types/node": "^20.17.6",
-    "typescript": "^5.6.3"
+    "typescript": "^5.7.0"
   },
   "engines": {
     "node": ">=18.17.0"
diff --git a/packages/env/src/cli/index.ts b/packages/env/src/cli/index.ts
index 8ee819a..f96e08c 100644
--- a/packages/env/src/cli/index.ts
+++ b/packages/env/src/cli/index.ts
@@ -20,7 +20,7 @@ import {
   discordBotEnvSchema,
   validateEnv,
   EnvValidationError,
-} from "../index.js";
+} from "../index.ts";
 
 type AppName = "dashboard" | "access-api" | "discord-bot";
 
diff --git a/packages/env/src/index.ts b/packages/env/src/index.ts
index bc1e53f..8e9e186 100644
--- a/packages/env/src/index.ts
+++ b/packages/env/src/index.ts
@@ -5,7 +5,7 @@
  * at startup.  This keeps validation in one place and avoids drift between apps.
  */
 
-export { dashboardEnvSchema, dashboardEnvBaseSchema, type DashboardEnv } from "./schemas/dashboard.js";
-export { accessApiEnvSchema, type AccessApiEnv } from "./schemas/access-api.js";
-export { discordBotEnvSchema, type DiscordBotEnv } from "./schemas/discord-bot.js";
-export { EnvValidationError, validateEnv } from "./validate.js";
\ No newline at end of file
+export { dashboardEnvSchema, dashboardEnvBaseSchema, type DashboardEnv } from "./schemas/dashboard.ts";
+export { accessApiEnvSchema, type AccessApiEnv } from "./schemas/access-api.ts";
+export { discordBotEnvSchema, type DiscordBotEnv } from "./schemas/discord-bot.ts";
+export { EnvValidationError, validateEnv } from "./validate.ts";
\ No newline at end of file
diff --git a/packages/env/test/dashboard.test.ts b/packages/env/test/dashboard.test.ts
index eab1ee1..d458500 100644
--- a/packages/env/test/dashboard.test.ts
+++ b/packages/env/test/dashboard.test.ts
@@ -1,8 +1,8 @@
 import assert from "node:assert/strict";
 import { test } from "node:test";
 
-import { dashboardEnvSchema } from "../src/schemas/dashboard.js";
-import { EnvValidationError, validateEnv } from "../src/validate.js";
+import { dashboardEnvSchema } from "../src/schemas/dashboard.ts";
+import { EnvValidationError, validateEnv } from "../src/validate.ts";
 
 test("applies development defaults when nothing is set", () => {
   const env = validateEnv(dashboardEnvSchema, {});
diff --git a/packages/env/tsconfig.json b/packages/env/tsconfig.json
index 67276f8..ecdd20e 100644
--- a/packages/env/tsconfig.json
+++ b/packages/env/tsconfig.json
@@ -6,7 +6,12 @@
     "rootDir": "src",
     "declaration": true,
     "emitDeclarationOnly": false,
-    "sourceMap": true
+    "sourceMap": true,
+    // Source imports use TypeScript syntax (e.g. "./schemas/dashboard.ts")
+    // instead of hardcoded ".js" extensions, so resolution no longer depends
+    // on the emit format. tsc rewrites these to ".js" in the emitted output.
+    "allowImportingTsExtensions": true,
+    "rewriteRelativeImportExtensions": true
   },
   "include": ["src"]
 }