diff --git a/.gitignore b/.gitignore
index dbacc54..e26c031 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,32 +1,35 @@
-# See https://help.github.com/ignore-files/ for more about ignoring files.
-
-# dependencies
-node_modules
-
-# builds
-build
-dist
-.rpt2_cache
-
-# misc
-.DS_Store
-.env
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Optional eslint cache
-.eslintcache
-
-coverage
-
-storybook-static
-.terraform
-terraform
-
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+node_modules
+
+# builds
+build
+dist
+.rpt2_cache
+
+# misc
+.DS_Store
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Optional eslint cache
+.eslintcache
+
+coverage
+
+storybook-static
+.terraform
+terraform
+
+# Ignore vs folder
+.vs
+
 .npmrc
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53cd1a5..99dc9ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- `isValidGuid` unwanted behaviour which was returning false for Guid sequentially generated by following Microsoft EntityFramework
+- maxGuid (`ffffffff-ffff-ffff-ffff-ffffffffffff`) is now recognized as valid Guid
+
 ## [1.3.0] - 2025-04-10
 
 ### Changed
diff --git a/src/lib/guid.spec.ts b/src/lib/guid.spec.ts
index d6a48b1..0c7dd9b 100644
--- a/src/lib/guid.spec.ts
+++ b/src/lib/guid.spec.ts
@@ -19,11 +19,11 @@ describe("guid tests", () => {
     [" ", false],
     ["507956c7-30b3-4401-9800-e5e7f8f3276X", false],
     ["507956c7-30b3-4401-9800-e5e7f8f32761", true],
+    ["f094d99a-347e-4fe5-eea2-08dbc5deb2a0", true],
     [newGuid(), true],
     [emptyGuid, true],
     ["3B467B14-CD99-4199-8E35-82B3C37182BA", true],
-    // MAX not recognized as guid > https://github.com/uuidjs/uuid/pull/714
-    ["ffffffff-ffff-ffff-ffff-ffffffffffff", false],
+    ["ffffffff-ffff-ffff-ffff-ffffffffffff", true],
   ])("isValidGuid", (value, expected) => {
     expect(isValidGuid(value)).toBe(expected);
   });
diff --git a/src/lib/guid.ts b/src/lib/guid.ts
index 630e350..0577f1f 100644
--- a/src/lib/guid.ts
+++ b/src/lib/guid.ts
@@ -9,12 +9,13 @@ export function newGuid() {
 }
 
 /**
- * Check whether a string it is a valid Guid (version 4 UUID)
+ * Check whether a string it is a valid Guid
  * @param str The string to test whether it is a valid Guid
  * @returns A value indicating whether the string is a valid Guid
  */
 export function isValidGuid(str: string) {
-  return uuid.validate(str);
+  const regex = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+  return typeof str === "string" && regex.test(str);
 }
 
 /**