diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc4214f9..e80b39bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,12 @@
 
+# v0.2.1
+
+- add const on multiple functions where applicable
+- update nalgebra to 0.31.0
+- update num-traits to 0.2.15
+- update rayon to 1.5.3
+ 
+
 # v0.2.0
 
 First release
diff --git a/Cargo.toml b/Cargo.toml
index 33a958c7..2d6b898f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lattice-qcd-rs"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Aliénore Bouttefeux <alienore.bouttefeux@gmail.com>"]
 edition = "2021"
 readme = "README.md"
@@ -10,6 +10,7 @@ description = "Lattice QCD simulation"
 keywords = ["QCD", "Lattice", "Monte-Carlo", "chromodynamics"]
 publish = true
 license = "MIT OR Apache-2.0"
+rust-version = "1.61"
 
 [lib]
 path = "src/lib.rs"
@@ -24,15 +25,15 @@ default = ["serde-serialize"]
 members = ["procedural_macro"]
 
 [dependencies]
-nalgebra = { version = "0.31", features = ["serde-serialize"] }
+nalgebra = { version = "0.31.0", features = ["serde-serialize"] }
 approx = "0.5.1"
-num-traits = "0.2.14"
+num-traits = "0.2.15"
 rand = "0.8.5"
 rand_distr = "0.4.3"
 crossbeam = "0.8.1"
-rayon = "1.5.1"
+rayon = "1.5.3"
 serde = { version = "1.0", features = ["derive"], optional = true }
-lattice_qcd_rs-procedural_macro = {path = "procedural_macro", version = "0.2.0"}
+lattice_qcd_rs-procedural_macro = {path = "procedural_macro", version = "0.2.1"}
 
 [dev-dependencies]
 criterion = "0.3.5"
diff --git a/README.md b/README.md
index 9cc24a69..32590ddd 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Check out my other repo [plaquette](https://github.com/ABouttefeux/plaquette), a
 
 ## Usage
 
-Add `lattice_qcd_rs = { version = "0.2.0", git = "https://github.com/ABouttefeux/lattice_qcd_rs" }` into your `cargo.toml`.
+Add `lattice_qcd_rs = { version = "0.2.1", git = "https://github.com/ABouttefeux/lattice_qcd_rs" }` into your `cargo.toml`.
 The set of features are 
  - `serde-serialize` on by default permit the use of serde on some structure
  - `no-overflow-test` usage interns to desable overflow test for coverage.
diff --git a/procedural_macro/CHANGELOG.md b/procedural_macro/CHANGELOG.md
new file mode 100644
index 00000000..9ffdb584
--- /dev/null
+++ b/procedural_macro/CHANGELOG.md
@@ -0,0 +1,10 @@
+
+# v0.2.1
+
+- update quote to 1.0.19
+- update syn to 1.0.98
+- update proc-macro2 to 1.0.39
+
+# v0.2.0
+
+First release
diff --git a/procedural_macro/Cargo.toml b/procedural_macro/Cargo.toml
index 8c4925da..ccbe949d 100644
--- a/procedural_macro/Cargo.toml
+++ b/procedural_macro/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lattice_qcd_rs-procedural_macro"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Aliénore Bouttefeux <alienore.bouttefeux@gmail.com>"]
 edition = "2021"
 description = "Set of procedural macro for the main library lattice_qcd_rs"
@@ -12,9 +12,9 @@ publish = true
 proc-macro = true
 
 [dependencies]
-quote = "1.0.17"
-syn = "1.0.90"
-proc-macro2 = "1.0.36"
+quote = "1.0.19"
+syn = "1.0.98"
+proc-macro2 = "1.0.39"
 
 [dev-dependencies]
 version-sync = "0.9.4"
\ No newline at end of file
diff --git a/procedural_macro/README.md b/procedural_macro/README.md
index c5c3e352..026fa463 100644
--- a/procedural_macro/README.md
+++ b/procedural_macro/README.md
@@ -1,4 +1,4 @@
-# Procedural macro for lattice_qcd_rs v0.2.0
+# Procedural macro for lattice_qcd_rs v0.2.1
 
 ![](https://img.shields.io/badge/language-Rust-orange)
 ![License](https://img.shields.io/badge/license-MIT_OR_Apache--2.0-blue.svg)
diff --git a/procedural_macro/src/lib.rs b/procedural_macro/src/lib.rs
index bb823373..fe761195 100644
--- a/procedural_macro/src/lib.rs
+++ b/procedural_macro/src/lib.rs
@@ -29,7 +29,7 @@
 #![warn(clippy::missing_errors_doc)]
 #![warn(missing_docs)]
 #![forbid(unsafe_code)]
-#![doc(html_root_url = "https://docs.rs/lattice_qcd_rs-procedural_macro/0.2.0")]
+#![doc(html_root_url = "https://docs.rs/lattice_qcd_rs-procedural_macro/0.2.1")]
 
 /// Only contains the version test.
 #[cfg(test)]
diff --git a/src/lib.rs b/src/lib.rs
index c4caa606..8ef3f94e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -29,7 +29,7 @@
 #![warn(clippy::missing_errors_doc)]
 #![warn(missing_docs)]
 #![forbid(unsafe_code)]
-#![doc(html_root_url = "https://docs.rs/lattice_qcd_rs/0.2.0")]
+#![doc(html_root_url = "https://docs.rs/lattice_qcd_rs/0.2.1")]
 
 extern crate approx;
 extern crate crossbeam;