diff --git a/nix/overlays/postgresql-legacy.nix b/nix/overlays/postgresql-legacy.nix
index 6e3afbdd6..248f9f424 100644
--- a/nix/overlays/postgresql-legacy.nix
+++ b/nix/overlays/postgresql-legacy.nix
@@ -2,19 +2,18 @@ self: super:
 # Overlay that adds legacy versions of PostgreSQL that are supported by
 # PostgREST.
 {
-  # PostgreSQL 9.5 was removed from Nixpkgs with
-  # https://github.com/NixOS/nixpkgs/commit/72ab382fb6b729b0d654f2c03f5eb25b39f11fbb
+  # PostgreSQL 9.6 was removed from Nixpkgs with
+  # https://github.com/NixOS/nixpkgs/commit/757dd008b2f2926fc0f7688fa8189f930ea47521
   # We pin its parent commit to get the last version that was available.
-  # postgresql_9_5 =
-  #  let
-  #    rev = "55ac7d4580c9ab67848c98cb9519317a1cc399c8";
-  #    tarballHash = "02ffj9f8s1hwhmxj85nx04sv64qb6jm7w0122a1dz9n32fymgklj";
-  #
-  #    pinnedPkgs =
-  #      builtins.fetchTarball {
-  #        url = "https://github.com/nixos/nixpkgs/archive/${rev}.tar.gz";
-  #        sha256 = tarballHash;
-  #      };
-  #  in
-  #  (import pinnedPkgs { }).pkgs.postgresql_9_5;
+  postgresql_9_6 =
+    let
+      rev = "571cbf3d1db477058303cef8754fb85a14e90eb7";
+      tarballHash = "0q74wn418i1bn5sssacmw8ykpmqvzr0s93sj6pbs3rf6bf134fkz";
+      pinnedPkgs =
+        builtins.fetchTarball {
+          url = "https://github.com/nixos/nixpkgs/archive/${rev}.tar.gz";
+          sha256 = tarballHash;
+        };
+    in
+    (import pinnedPkgs { }).pkgs.postgresql_9_6;
 }