diff --git a/libraries/compile-examples/compilesketches/requirements.txt b/libraries/compile-examples/compilesketches/requirements.txt
index f3a619c3..ae4d06a0 100644
--- a/libraries/compile-examples/compilesketches/requirements.txt
+++ b/libraries/compile-examples/compilesketches/requirements.txt
@@ -1,3 +1,4 @@
 GitPython==3.1.2
 PyGithub==1.51
 PyYAML==5.3.1
+PySerial==3.4