diff --git a/package.json b/package.json
index 982fe9b..47b7ccd 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "test:watch": "jest src/ test/ --watch",
     "start": "node bin/make-workout.js",
     "format:js": "prettier --write src/",
-    "build": "tsc",
+    "build": "tsc --project tsconfig.release.json",
     "prepublish": "yarn build"
   },
   "main": "dist/index.js",
diff --git a/tsconfig.json b/tsconfig.json
index 234824e..b119109 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,6 +12,7 @@
     "declaration": true,
   },
   "include": [
-    "src/**/*"
+    "src/**/*",
+    "test/**/*"
   ],
 }
diff --git a/tsconfig.release.json b/tsconfig.release.json
new file mode 100644
index 0000000..60ac411
--- /dev/null
+++ b/tsconfig.release.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "include": [
+    "src/**/*",
+  ],
+  "exclude": [
+    "**/*.test.ts",
+  ],
+}