diff --git a/music-pitch.cabal b/music-pitch.cabal
--- a/music-pitch.cabal
+++ b/music-pitch.cabal
@@ -1,6 +1,6 @@
 
 name:                   music-pitch
-version:                1.6.2
+version:                1.7
 cabal-version:          >= 1.10
 author:                 Hans Hoglund
 maintainer:             Hans Hoglund
@@ -33,7 +33,7 @@
                         containers,
                         semigroups              >= 0.13.0.1 && < 1,
                         semigroupoids,
-                        music-pitch-literal     == 1.6.2,
+                        music-pitch-literal     == 1.7,
                         vector-space
     exposed-modules:    Music.Pitch
                         Music.Pitch.Absolute
@@ -43,7 +43,6 @@
                         Music.Pitch.Common.Semitones
                         Music.Pitch.Common.Spell
                         Music.Pitch.Common.Harmony
-                        Music.Pitch.Koizumi
                         Music.Pitch.Tokawa
                         Music.Pitch.Intonation
     hs-source-dirs:     src
diff --git a/src/Music/Pitch/Koizumi.hs b/src/Music/Pitch/Koizumi.hs
deleted file mode 100644
--- a/src/Music/Pitch/Koizumi.hs
+++ /dev/null
@@ -1,3 +0,0 @@
-
-module Music.Pitch.Koizumi where
-