diff --git a/ChangeLog.md b/ChangeLog.md
index d65fe35..4ef2710 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,4 +1,4 @@
-# Version 1.3.1 (released on: May 5, 2021)
+# Version 1.4.0 (released on: May 5, 2021)
 - New features:
     * Missing values are accepted if the input arrays have `eltype <:
       AbstractFloat`;
diff --git a/Project.toml b/Project.toml
index 71513e7..9a2b01a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Gnuplot"
 uuid = "dc211083-a33a-5b79-959f-2ff34033469d"
-version = "1.3.1"
+version = "1.4.0"
 
 [deps]
 ColorSchemes = "35d6a980-a343-548e-a6ea-1d62b119f2f4"
diff --git a/README.md b/README.md
index d25fc37..537905d 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 [![Build Status](https://travis-ci.org/gcalderone/Gnuplot.jl.svg?branch=master)](https://travis-ci.org/gcalderone/Gnuplot.jl)
 [![License](http://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat)](LICENSE.md)
-[![DocumentationStatus](https://img.shields.io/badge/docs-stable-blue.svg?style=flat)](https://gcalderone.github.io/Gnuplot.jl/v1.3.1/)
+[![DocumentationStatus](https://img.shields.io/badge/docs-stable-blue.svg?style=flat)](https://gcalderone.github.io/Gnuplot.jl/v1.4.0/)
 
 
 **Gnuplot.jl** is a simple package able to send both data and commands from Julia to an underlying [gnuplot](http://gnuplot.sourceforge.net/) process.  Its main purpose it to provide a fast and powerful data visualization framework, using an extremely concise Julia syntax. It also has automatic display of plots in Jupyter, Juno and VS Code.
@@ -21,9 +21,9 @@ You may check the installed **Gnuplot.jl** version with:
 ```julia
 ]st Gnuplot
 ```
-If the displayed version is not v1.3.1 you are probably having a dependency conflict. In this case try forcing installation of the latest version with:
+If the displayed version is not v1.4.0 you are probably having a dependency conflict. In this case try forcing installation of the latest version with:
 ```julia
-]add Gnuplot@1.3.1
+]add Gnuplot@1.4.0
 ```
 and check which package is causing the conflict.
 
@@ -37,7 +37,7 @@ test_terminal()
 
 
 ## Quick start
-The following examples are supposed to be self-explaining.  See [documentation](https://gcalderone.github.io/Gnuplot.jl/v1.3.1/) for further informations.
+The following examples are supposed to be self-explaining.  See [documentation](https://gcalderone.github.io/Gnuplot.jl/v1.4.0/) for further informations.
 
 ### A simple parabola
 ```julia
diff --git a/docs/src/install.md b/docs/src/install.md
index 8ab5494..569160b 100644
--- a/docs/src/install.md
+++ b/docs/src/install.md
@@ -19,11 +19,11 @@ Check **Gnuplot.jl** version with:
 ```julia-repl
 julia> ]st Gnuplot
 Status `~/.julia/environments/v1.4/Project.toml`
-  [dc211083] Gnuplot v1.3.1
+  [dc211083] Gnuplot v1.4.0
 ```
-If the displayed version is not `v1.3.1` you are probably having a dependency conflict.  In this case try forcing installation of the latest version with:
+If the displayed version is not `v1.4.0` you are probably having a dependency conflict.  In this case try forcing installation of the latest version with:
 ```julia-repl
-julia> ]add Gnuplot@1.3.1
+julia> ]add Gnuplot@1.4.0
 ```
 and check which package is causing the conflict.
 
diff --git a/src/Gnuplot.jl b/src/Gnuplot.jl
index ea90641..18a8057 100644
--- a/src/Gnuplot.jl
+++ b/src/Gnuplot.jl
@@ -1347,7 +1347,7 @@ end
 
 Return the **Gnuplot.jl** package version.
 """
-version() = v"1.3.1"
+version() = v"1.4.0"
 
 # ---------------------------------------------------------------------
 """