diff --git a/Cargo.lock b/Cargo.lock
index 5ee397d51..ca2d039a5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -15,7 +15,7 @@ dependencies = [
 
 [[package]]
 name = "erg"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 dependencies = [
  "erg_common",
  "erg_compiler",
@@ -25,14 +25,14 @@ dependencies = [
 
 [[package]]
 name = "erg_common"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 dependencies = [
  "atty",
 ]
 
 [[package]]
 name = "erg_compiler"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 dependencies = [
  "erg_common",
  "erg_parser",
@@ -41,14 +41,14 @@ dependencies = [
 
 [[package]]
 name = "erg_parser"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 dependencies = [
  "erg_common",
 ]
 
 [[package]]
 name = "erg_type"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 dependencies = [
  "erg_common",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index be6877708..8c7d2f70f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "erg"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 description = "The Erg programming language"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -46,10 +46,10 @@ traditional_chinese = [
 ]
 
 [dependencies]
-erg_common = { version = "0.3.2", path = "./compiler/erg_common" }
-erg_parser = { version = "0.3.2", path = "./compiler/erg_parser" }
-erg_compiler = { version = "0.3.2", path = "./compiler/erg_compiler" }
-erg_type = { version = "0.3.2", path = "./compiler/erg_type" }
+erg_common = { version = "0.4.0-beta.0", path = "./compiler/erg_common" }
+erg_parser = { version = "0.4.0-beta.0", path = "./compiler/erg_parser" }
+erg_compiler = { version = "0.4.0-beta.0", path = "./compiler/erg_compiler" }
+erg_type = { version = "0.4.0-beta.0", path = "./compiler/erg_type" }
 
 # [workspace]
 # member = ["cm", "dyne"]
diff --git a/compiler/erg_common/Cargo.toml b/compiler/erg_common/Cargo.toml
index 913bb1e49..5405e3a95 100644
--- a/compiler/erg_common/Cargo.toml
+++ b/compiler/erg_common/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "erg_common"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 description = "A common components library of Erg"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
diff --git a/compiler/erg_compiler/Cargo.toml b/compiler/erg_compiler/Cargo.toml
index ad8067cc4..083ea9be0 100644
--- a/compiler/erg_compiler/Cargo.toml
+++ b/compiler/erg_compiler/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "erg_compiler"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 description = "Centimetre: the Erg compiler"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -17,9 +17,9 @@ simplified_chinese = [ "erg_common/simplified_chinese", "erg_parser/simplified_c
 traditional_chinese = [ "erg_common/traditional_chinese", "erg_parser/traditional_chinese", "erg_type/traditional_chinese" ]
 
 [dependencies]
-erg_common = { version = "0.3.2", path = "../erg_common" }
-erg_parser = { version = "0.3.2", path = "../erg_parser" }
-erg_type = { version = "0.3.2", path = "../erg_type" }
+erg_common = { version = "0.4.0-beta.0", path = "../erg_common" }
+erg_parser = { version = "0.4.0-beta.0", path = "../erg_parser" }
+erg_type = { version = "0.4.0-beta.0", path = "../erg_type" }
 
 [lib]
 path = "lib.rs"
diff --git a/compiler/erg_parser/Cargo.toml b/compiler/erg_parser/Cargo.toml
index 9769b4d5d..e237412f6 100644
--- a/compiler/erg_parser/Cargo.toml
+++ b/compiler/erg_parser/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "erg_parser"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 description = "The Erg parser"
 authors = ["mtshiba <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -16,7 +16,7 @@ simplified_chinese = [ "erg_common/simplified_chinese" ]
 traditional_chinese = [ "erg_common/traditional_chinese" ]
 
 [dependencies]
-erg_common = { version = "0.3.2", path = "../erg_common" }
+erg_common = { version = "0.4.0-beta.0", path = "../erg_common" }
 
 [lib]
 path = "lib.rs"
diff --git a/compiler/erg_type/Cargo.toml b/compiler/erg_type/Cargo.toml
index e209f6052..80e044b2c 100644
--- a/compiler/erg_type/Cargo.toml
+++ b/compiler/erg_type/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "erg_type"
-version = "0.3.2"
+version = "0.4.0-beta.0"
 description = "APIs for Erg types"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -18,7 +18,7 @@ simplified_chinese = [ "erg_common/simplified_chinese" ]
 traditional_chinese = [ "erg_common/traditional_chinese" ]
 
 [dependencies]
-erg_common = { version = "0.3.2", path = "../erg_common" }
+erg_common = { version = "0.4.0-beta.0", path = "../erg_common" }
 
 [lib]
 path = "lib.rs"