diff --git a/Project.toml b/Project.toml
index 389c73c..31604ed 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "CoordinateConverterGK"
 uuid = "d77a50d3-17ea-48e4-bb1c-35f220bfae06"
 authors = ["Takuya Miyashita"]
-version = "0.3.0"
+version = "0.4.0"
 
 [compat]
 julia = "1.3, 1.4, 1.5, 1.6"