diff --git a/changelog.d/11725.doc b/changelog.d/11725.doc
new file mode 100644
index 0000000000..46eb9b814f
--- /dev/null
+++ b/changelog.d/11725.doc
@@ -0,0 +1 @@
+Document that now the minimum supported PostgreSQL version is 10.
diff --git a/docs/postgres.md b/docs/postgres.md
index e4861c1f12..0562021da5 100644
--- a/docs/postgres.md
+++ b/docs/postgres.md
@@ -1,6 +1,6 @@
 # Using Postgres
 
-Synapse supports PostgreSQL versions 9.6 or later.
+Synapse supports PostgreSQL versions 10 or later.
 
 ## Install postgres client libraries