diff --git a/.version-determinate b/.version-determinate
index 4a36342fc..fd2a01863 100644
--- a/.version-determinate
+++ b/.version-determinate
@@ -1 +1 @@
-3.0.0
+3.1.0
diff --git a/doc/manual/source/SUMMARY.md.in b/doc/manual/source/SUMMARY.md.in
index c218c306b..57edad199 100644
--- a/doc/manual/source/SUMMARY.md.in
+++ b/doc/manual/source/SUMMARY.md.in
@@ -129,6 +129,7 @@
 - [Determinate Nix Release Notes](release-notes-determinate/index.md)
   - [Changes between Nix and Determinate Nix](release-notes-determinate/changes.md)
   - [Release 3.0.0 (2025-03-04)](release-notes-determinate/rl-3.0.0.md)
+  - [Release 3.1.0 (2025-??-??)](release-notes-determinate/rl-3.1.0.md)
 - [Nix Release Notes](release-notes/index.md)
 {{#include ./SUMMARY-rl-next.md}}
   - [Release 2.27 (2025-03-03)](release-notes/rl-2.27.md)
diff --git a/doc/manual/source/release-notes-determinate/changes.md b/doc/manual/source/release-notes-determinate/changes.md
index 4f60f139b..fa468dee9 100644
--- a/doc/manual/source/release-notes-determinate/changes.md
+++ b/doc/manual/source/release-notes-determinate/changes.md
@@ -1,6 +1,6 @@
 # Changes between Nix and Determinate Nix
 
-This section lists the differences between upstream Nix 2.24 and Determinate Nix 3.0.0.
+This section lists the differences between upstream Nix 2.24 and Determinate Nix 3.1.0.
 
 * In Determinate Nix, flakes are stable. You no longer need to enable the `flakes` experimental feature.
 
diff --git a/doc/manual/source/release-notes-determinate/rl-3.1.0.md b/doc/manual/source/release-notes-determinate/rl-3.1.0.md
new file mode 100644
index 000000000..8d55939da
--- /dev/null
+++ b/doc/manual/source/release-notes-determinate/rl-3.1.0.md
@@ -0,0 +1,3 @@
+# Release 3.1.0 (2025-??-??)
+
+* Based on [upstream Nix 2.27.1](../release-notes/rl-2.27.md).