diff --git a/CMakeLists.txt b/CMakeLists.txt
index a91a8d4e4..cebf042c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ set(PROJECT_NAME Tasks)
 set(PROJECT_DESCRIPTION "...")
 set(PROJECT_URL "https://github.com/jrl-umi3218/Tasks")
 set(PROJECT_DEBUG_POSTFIX "_d")
-set(PROJECT_VERSION 1.3.1)
+set(PROJECT_VERSION 1.4.0)
 set(PROJECT_USE_CMAKE_EXPORT TRUE)
 
 # Disable -Werror on Unix for now.
diff --git a/conanfile.py b/conanfile.py
index 512751f95..387bc0406 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -10,7 +10,7 @@
 
 class TasksConan(base.Eigen3ToPythonConan):
     name = "Tasks"
-    version = "1.3.1"
+    version = "1.4.0"
     description = "Real time control of robots using constrained optimization"
     topics = ("robotics", "control", "optimization", "python")
     url = "https://github.com/jrl-umi3218/Tasks"
diff --git a/debian/changelog b/debian/changelog
index e675aecfa..9ff9e190e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+tasks (1.4.0-1debian1) unstable; urgency=medium
+
+  * Update upstream version
+
+ -- Pierre Gergondet <pierre.gergondet+ppa@gmail.com>  Thu, 15 Jul 2021 11:29:53 +0800
+
 tasks (1.3.1-1ubuntu1) unstable; urgency=medium
 
   * Update upstream version