diff --git a/Cargo.toml b/Cargo.toml
index 3ea211fb..1f615652 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,11 @@ description = "The Erg programming language"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+repository = "https://github.com/erg-lang/erg"
+documentation = "https://docs.rs/erg"
+homepage = "https://erg-lang.github.io/"
+keywords = ["erg", "programming language"]
+categories = ["programming language", "application"]
 
 [features]
 # when "debug" feature is turned on, that of the following crates will also be turned on.
diff --git a/src/erg_common/Cargo.toml b/src/erg_common/Cargo.toml
index c002ed6c..d16b5d27 100644
--- a/src/erg_common/Cargo.toml
+++ b/src/erg_common/Cargo.toml
@@ -5,6 +5,9 @@ description = "A common components library of Erg"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+repository = "https://github.com/erg-lang/erg/tree/main/src/erg_common"
+documentation = "https://docs.rs/erg_common"
+homepage = "https://erg-lang.github.io/"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/src/erg_compiler/Cargo.toml b/src/erg_compiler/Cargo.toml
index 38e66186..8839bbe6 100644
--- a/src/erg_compiler/Cargo.toml
+++ b/src/erg_compiler/Cargo.toml
@@ -5,6 +5,9 @@ description = "Centimetre: the Erg compiler"
 authors = ["Shunsuke Shibayama <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+repository = "https://github.com/erg-lang/erg/tree/main/src/erg_compiler"
+documentation = "https://docs.rs/erg_compiler"
+homepage = "https://erg-lang.github.io/"
 
 [features]
 # when "debug" feature is turned on, that of parser will also be turned on.
diff --git a/src/erg_compiler/erg_parser/Cargo.toml b/src/erg_compiler/erg_parser/Cargo.toml
index bd785fed..73f82b82 100644
--- a/src/erg_compiler/erg_parser/Cargo.toml
+++ b/src/erg_compiler/erg_parser/Cargo.toml
@@ -5,6 +5,9 @@ description = "The Erg parser"
 authors = ["mtshiba <sbym1346@gmail.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+repository = "https://github.com/erg-lang/erg/tree/main/src/erg_compiler/erg_parser"
+documentation = "https://docs.rs/erg_parser"
+homepage = "https://erg-lang.github.io/"
 
 [features]
 debug = [ "erg_common/debug" ]