diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 1d69cdbc8..d4fd96da6 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -11,7 +11,7 @@ For a list of important changes that require manual actions, please look at rele
 
 
 [[v4.0.5]]
-== Version 4.0.5 (under dev)
+== Version 4.0.5 (2023-09-24)
 
 New features::
 
diff --git a/ReleaseNotes.adoc b/ReleaseNotes.adoc
index 96bd24f4c..2eab0f32c 100644
--- a/ReleaseNotes.adoc
+++ b/ReleaseNotes.adoc
@@ -12,7 +12,7 @@ For a complete list of changes, please look at ChangeLog.
 
 
 [[v4.0.5]]
-== Version 4.0.5 (under dev)
+== Version 4.0.5 (2023-09-24)
 
 No release notes.
 
diff --git a/version.sh b/version.sh
index 9ae284433..a4839e864 100755
--- a/version.sh
+++ b/version.sh
@@ -39,8 +39,8 @@
 #     devel-number   the devel version as hex number ("0x04010000" for "4.1.0-dev")
 #
 
-WEECHAT_STABLE="4.0.4"
-WEECHAT_DEVEL="4.0.5-dev"
+WEECHAT_STABLE="4.0.5"
+WEECHAT_DEVEL="4.0.5"
 
 STABLE_MAJOR=$(echo "${WEECHAT_STABLE}" | cut -d"." -f1)
 STABLE_MINOR=$(echo "${WEECHAT_STABLE}" | cut -d"." -f2)