diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f94140..f73c91d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Version 3.1.0 : Differentiation #1 
+First differentiation version, it differentiates classic and user defined
+polynomials
+
 # Version 3.0.1 : Bug fix
 Fix stackoverflow on custom function call with same name 
 
diff --git a/Cargo.lock b/Cargo.lock
index b1ed428..3d48a3e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -221,7 +221,7 @@ checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
 [[package]]
 name = "mini-calc"
-version = "3.0.1"
+version = "3.1.0"
 dependencies = [
  "ansi_term",
  "atty",
diff --git a/Cargo.toml b/Cargo.toml
index db06af7..5450c9f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mini-calc"
-version = "3.0.1"
+version = "3.1.0"
 license = "GPL-3.0-or-later"
 description = "A fully-featured minimalistic configurable rust calculator"
 homepage = "https://calc.nwa2coco.fr"
diff --git a/src/configuration/loader.rs b/src/configuration/loader.rs
index 399053a..df8a28d 100644
--- a/src/configuration/loader.rs
+++ b/src/configuration/loader.rs
@@ -131,7 +131,7 @@ pub fn load_color(string: String) -> Color {
 
 pub fn replace_variable(str: String) -> String {
     str.replace("%author%", "Charlotte Thomas")
-        .replace("%version%", "v3.0.1")
+        .replace("%version%", "v3.1.0")
         .to_string()
 }
 
diff --git a/src/main.rs b/src/main.rs
index 6271ee0..ba56ae9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -263,7 +263,7 @@ fn handle_config(line: &str, config: Config) -> (String, Option<Config>) {
 fn main() {
     let mut args: Args = env::args();
 
-    let version: String = "v3.0.1".to_string();
+    let version: String = "v3.1.0".to_string();
     if args.len() > 1 || !atty::is(Stream::Stdin) {
         let mut a = vec![];