diff --git a/P/PiezoSerial/Compat.toml b/P/PiezoSerial/Compat.toml
index 9a7aae1..161976f 100644
--- a/P/PiezoSerial/Compat.toml
+++ b/P/PiezoSerial/Compat.toml
@@ -1,2 +1,5 @@
 [0]
 julia = ["0.7", "1"]
+
+["0.2.1-0"]
+SerialPorts = "0.2"
diff --git a/P/PiezoSerial/Versions.toml b/P/PiezoSerial/Versions.toml
index a6362be..a1c04a8 100644
--- a/P/PiezoSerial/Versions.toml
+++ b/P/PiezoSerial/Versions.toml
@@ -1,2 +1,5 @@
 ["0.2.0"]
 git-tree-sha1 = "b9053748a74d541a183b3513adbe103e3304e54e"
+
+["0.2.1"]
+git-tree-sha1 = "535e68c07b6ac433f919dad2f397907f3b11f761"