diff --git a/repositories.txt b/repositories.txt
index 016eface..2b9c5905 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -5103,3 +5103,4 @@ https://github.com/matthieuvigne/RMDX-Arduino
 https://github.com/khoih-prog/AsyncTCP_RP2040W
 https://github.com/khoih-prog/AsyncWebServer_RP2040W
 https://github.com/khoih-prog/AsyncHTTPRequest_RP2040W
+https://github.com/fatlab101/FixedString