diff --git a/changelog.d/11725.doc b/changelog.d/11725.doc
new file mode 100644
index 0000000000000000000000000000000000000000..46eb9b814fc3f7a8f0cd07f64f2607be4b298dae
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+++ 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 e4861c1f127f840bede0fbd159d0a8ab7e64db78..0562021da52644b7d97016a687345f17eb17dc4f 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