diff --git a/multibase.go b/multibase.go
index 0f9b396..a60403d 100644
--- a/multibase.go
+++ b/multibase.go
@@ -16,7 +16,6 @@ type Encoding int
 // supported yet
 const (
 	Identity          = 0x00
-	Base1             = '1'
 	Base2             = '0'
 	Base8             = '7'
 	Base10            = '9'
diff --git a/spec b/spec
index f0792f7..65d3fff 160000
--- a/spec
+++ b/spec
@@ -1 +1 @@
-Subproject commit f0792f703031bb01251aa99fcea6a5fe945b6297
+Subproject commit 65d3fff8341f525c68d8b3e56fa668e2c8c4956b