diff --git a/TrimSPlib.js b/TrimSPlib.js
index 0950b33..2622b61 100644
--- a/TrimSPlib.js
+++ b/TrimSPlib.js
@@ -142,8 +142,8 @@ function Massof(Element)
 {
     var ElementsA = {
 	"Muon":0.1134289259,
-	"Li8":8.0,
-	"B12":12.0,
+	"Li8":8.02248624,
+	"B12":12.0143526,
 	"H":1.00800,
 	"He":4.00300,
 	"Li":6.93900,