diff --git a/VERSION b/VERSION
index 1b8ef0972..1c8686e67 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3-dev
+3.43
diff --git a/doc/contributing/source/conf.py b/doc/contributing/source/conf.py
index 3e37fd6a4..041d3798f 100644
--- a/doc/contributing/source/conf.py
+++ b/doc/contributing/source/conf.py
@@ -49,9 +49,9 @@ copyright = "2015, ns-3 project"
 # built documents.
 #
 # The short X.Y version.
-version = "ns-3-dev"
+version = "ns-3.43"
 # The full version, including alpha/beta/rc tags.
-release = "ns-3-dev"
+release = "ns-3.43"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/doc/installation/source/conf.py b/doc/installation/source/conf.py
index 165ad8a12..9d427c4cd 100644
--- a/doc/installation/source/conf.py
+++ b/doc/installation/source/conf.py
@@ -49,9 +49,9 @@ copyright = "2018, ns-3 project"
 # built documents.
 #
 # The short X.Y version.
-version = "ns-3-dev"
+version = "ns-3.43"
 # The full version, including alpha/beta/rc tags.
-release = "ns-3-dev"
+release = "ns-3.43"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/doc/manual/source/conf.py b/doc/manual/source/conf.py
index f93053183..8a172ba7d 100644
--- a/doc/manual/source/conf.py
+++ b/doc/manual/source/conf.py
@@ -74,9 +74,9 @@ copyright = "2006-2019, ns-3 project"
 # built documents.
 #
 # The short X.Y version.
-version = "ns-3-dev"
+version = "ns-3.43"
 # The full version, including alpha/beta/rc tags.
-release = "ns-3-dev"
+release = "ns-3.43"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/doc/models/source/conf.py b/doc/models/source/conf.py
index 806d96137..7b24da99d 100644
--- a/doc/models/source/conf.py
+++ b/doc/models/source/conf.py
@@ -74,9 +74,9 @@ copyright = "2006-2019, ns-3 project"
 # built documents.
 #
 # The short X.Y version.
-version = "ns-3-dev"
+version = "ns-3.43"
 # The full version, including alpha/beta/rc tags.
-release = "ns-3-dev"
+release = "ns-3.43"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/doc/tutorial/source/conf.py b/doc/tutorial/source/conf.py
index d20defe65..379cf595c 100644
--- a/doc/tutorial/source/conf.py
+++ b/doc/tutorial/source/conf.py
@@ -71,9 +71,9 @@ copyright = "2006-2019, ns-3 project"
 # built documents.
 #
 # The short X.Y version.
-version = "ns-3-dev"
+version = "ns-3.43"
 # The full version, including alpha/beta/rc tags.
-release = "ns-3-dev"
+release = "ns-3.43"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.