diff --git a/tsconfig.base.json b/tsconfig.base.json
index 971b37f..47744a0 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -19,13 +19,5 @@
             "es2015",
             "es2015.core"
         ]
-    },
-    "include": [
-        "src"
-    ],
-    "exclude": [
-        "dist",
-        "node_modules",
-        "test"
-    ]
-}
\ No newline at end of file
+    }
+}
diff --git a/tsconfig.cjs.json b/tsconfig.cjs.json
index 8411f0d..5474a45 100644
--- a/tsconfig.cjs.json
+++ b/tsconfig.cjs.json
@@ -1,8 +1,8 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.src.base.json",
     "compilerOptions": {
         "module": "commonjs",
         "outDir": "./dist/cjs",
         "target": "ES2015"
     }
-}
\ No newline at end of file
+}
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
index d6aae5e..e7a334c 100644
--- a/tsconfig.esm.json
+++ b/tsconfig.esm.json
@@ -1,8 +1,8 @@
 {
-    "extends": "./tsconfig.base.json",
+    "extends": "./tsconfig.src.base.json",
     "compilerOptions": {
         "module": "es6",
         "outDir": "./dist/esm",
         "target": "es6"
     }
-}
\ No newline at end of file
+}
diff --git a/tsconfig.src.base.json b/tsconfig.src.base.json
new file mode 100644
index 0000000..452e67c
--- /dev/null
+++ b/tsconfig.src.base.json
@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.base.json",
+  "include": [
+    "src"
+  ],
+  "exclude": [
+    "dist",
+    "node_modules",
+    "test"
+  ]
+}