diff --git a/release.sh b/release.sh
index 33cb4f53..22d903c4 100755
--- a/release.sh
+++ b/release.sh
@@ -1,8 +1,8 @@
 #!/bin/zsh
 # This script is used to prepare a new release of i3.
 
-export RELEASE_VERSION="4.12"
-export PREVIOUS_VERSION="4.11"
+export RELEASE_VERSION="4.13"
+export PREVIOUS_VERSION="4.12"
 export RELEASE_BRANCH="next"
 
 if [ ! -e "../i3.github.io" ]