diff --git a/.mocharc.json b/.mocharc.json
new file mode 100644
index 0000000..efafb6e
--- /dev/null
+++ b/.mocharc.json
@@ -0,0 +1,3 @@
+{
+  "node-option": ["experimental-specifier-resolution=node"]
+}
diff --git a/src/QueryComplexity.ts b/src/QueryComplexity.ts
index 41dee1e..e0652b5 100644
--- a/src/QueryComplexity.ts
+++ b/src/QueryComplexity.ts
@@ -8,7 +8,7 @@ import {
   getArgumentValues,
   getDirectiveValues,
   getVariableValues,
-} from 'graphql/execution/values.js';
+} from 'graphql/execution/values';
 
 import {
   ValidationContext,