diff --git a/README.md b/README.md
index 963820ff..256a99ff 100644
--- a/README.md
+++ b/README.md
@@ -267,8 +267,8 @@ If Readest has been useful to you, consider supporting its development. You can
 ### Sponsors
 
 <p align="center">
-  <a title="Browser testing via LambdaTest" href="https://www.lambdatest.com/?utm_source=readest&utm_medium=sponsor" target="_blank">
-    <img src="https://www.lambdatest.com/blue-logo.png" style="vertical-align: middle;" width="250" />
+  <a title="Browser testing via TestMu AI" href="https://www.testmu.ai?utm_source=readest&utm_medium=sponsor" target="_blank">
+    <img src="https://raw.githubusercontent.com/readest/readest/refs/heads/main/data/sponsors/testmu-ai-logo.svg" style="vertical-align: middle;" width="250" />
   </a>
 </p>
 
diff --git a/data/sponsors/testmu-ai-logo.svg b/data/sponsors/testmu-ai-logo.svg
new file mode 100644
index 00000000..8dc22dc8
--- /dev/null
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