diff --git a/requirements.txt b/requirements.txt
index 97564b6..c45e3cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,5 @@ libscrc
 dmr_utils3
 cryptography
 Flask-Markdown
-twisted
\ No newline at end of file
+twisted
+aprslib
\ No newline at end of file