diff --git a/changelog/unreleased/issue-3129 b/changelog/unreleased/issue-3129
new file mode 100644
index 000000000..3340dca0e
--- /dev/null
+++ b/changelog/unreleased/issue-3129
@@ -0,0 +1,7 @@
+Enhancement: Add JSON support to prune
+
+Restic `prune` now also supports the `--json` option and gives all
+statistics in JSON format.
+
+https://github.com/restic/restic/issues/3129
+https://github.com/restic/restic/pull/5239
diff --git a/doc/060_forget.rst b/doc/060_forget.rst
index b211148cb..8758bf7aa 100644
--- a/doc/060_forget.rst
+++ b/doc/060_forget.rst
@@ -467,6 +467,8 @@ The ``prune`` command accepts the following options:
 
 -  ``--verbose`` increased verbosity shows additional statistics for ``prune``.
 
+-  ``--json`` gives the statistics in JSON format.
+
 
 Recovering from "no free space" errors
 **************************************