diff --git a/packages/validators/src/index.test.ts b/packages/validators/src/index.test.ts
index 304cc8a..dc5547b 100644
--- a/packages/validators/src/index.test.ts
+++ b/packages/validators/src/index.test.ts
@@ -14,6 +14,10 @@ describe("LogicSRC validators", () => {
     expect(validate("task", data).ok).toBe(true);
   });
 
+  it("parses JSON files case-insensitively by extension", () => {
+    expect(parseDocument('{"ok":true}', "TASK.JSON")).toEqual({ ok: true });
+  });
+
   it("rejects a task without a DID", () => {
     const result = validate("task", {
       type: "logicsrc.task",
diff --git a/packages/validators/src/index.ts b/packages/validators/src/index.ts
index 6ea71b2..f5c226a 100644
--- a/packages/validators/src/index.ts
+++ b/packages/validators/src/index.ts
@@ -18,7 +18,7 @@ export function createValidator() {
 }
 
 export function parseDocument(input: string, fileName = "document") {
-  if (fileName.endsWith(".json")) {
+  if (fileName.toLowerCase().endsWith(".json")) {
     return JSON.parse(input) as unknown;
   }