diff --git a/CHANGES.rst b/CHANGES.rst
index d62bdffa3ddbdb3d2d048c5f9fdcb1c9818c8e85..0bb30c77b82726de373350b494856ac2e6881008 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -87,6 +87,14 @@ Node
   consequence, the storage footprint will be lowered and only the last
   6 cycles will be available (10 previously).
 
+- Removed Giganode from the list of bootstrap peers for Mainnet.
+
+- Removed the ``--network hangzhounet`` and ``--network jakartanet``
+  built-in network aliases.
+
+- Add third user-activated upgrade to the ``--network ghostnet`` built-in
+  network alias (at level 1191936 for Kathmandu).
+
 Client
 ------
 
diff --git a/src/bin_node/node_config_file.ml b/src/bin_node/node_config_file.ml
index 4cc97dacdf955ba1cbdeaec9f04f775faf0cdad4..52829f491d0d33a97f210ac20dd4c25b6dc448fc 100644
--- a/src/bin_node/node_config_file.ml
+++ b/src/bin_node/node_config_file.ml
@@ -97,8 +97,6 @@ let sandbox_user_activated_upgrades = []
 (* END_PATCHING_ZONE_FOR_SANDBOX_USER_ACTIVATED_UPGRADES *)
 
 let blockchain_network_mainnet =
-  let giganode_1 = "116.202.172.21" in
-  let giganode_2 = "95.216.45.62" in
   make_blockchain_network
     ~alias:"mainnet"
     {
@@ -124,43 +122,7 @@ let blockchain_network_mainnet =
         ( "PtHangzHogokSuiMHemCuowEavgYTP8J5qQ9fQS793MHYFpCY3r",
           "PtHangz2aRngywmSRGGvrcTyMbbdpWdpFKuS4uMWxg2RaH9i1qx" );
       ]
-    ~default_bootstrap_peers:["boot.tzbeta.net"; giganode_1; giganode_2]
-
-let blockchain_network_hangzhounet =
-  make_blockchain_network
-    ~alias:"hangzhounet"
-    {
-      time = Time.Protocol.of_notation_exn "2021-11-04T15:00:00Z";
-      block =
-        Block_hash.of_b58check_exn
-          "BLockGenesisGenesisGenesisGenesisGenesis7e8c4d4snJW";
-      protocol =
-        Protocol_hash.of_b58check_exn
-          "Ps9mPmXaRzmzk35gbAYNCAw6UXdE2qoABTHbN2oEEc1qM7CwT9P";
-    }
-    ~genesis_parameters:
-      {
-        context_key = "sandbox_parameter";
-        values =
-          `O
-            [
-              ( "genesis_pubkey",
-                `String "edpkuYLienS3Xdt5c1vfRX1ibMxQuvfM67ByhJ9nmRYYKGAAoTq1UC"
-              );
-            ];
-      }
-    ~chain_name:"TEZOS_HANGZHOUNET_2021-11-04T15:00:00Z"
-    ~sandboxed_chain_name:"SANDBOXED_TEZOS"
-    ~user_activated_upgrades:
-      [(8191l, "PtHangz2aRngywmSRGGvrcTyMbbdpWdpFKuS4uMWxg2RaH9i1qx")]
-    ~default_bootstrap_peers:
-      [
-        "hangzhounet.teztnets.xyz";
-        "hangzhounet.kaml.fr";
-        "hangzhounet.smartpy.io";
-        "hangzhounet.tezos.co.il";
-        "hangzhounet.boot.tez.ie";
-      ]
+    ~default_bootstrap_peers:["boot.tzbeta.net"]
 
 let blockchain_network_ghostnet =
   make_blockchain_network
@@ -191,6 +153,7 @@ let blockchain_network_ghostnet =
       [
         (8191l, "Psithaca2MLRFYargivpo7YvUr7wUDqyxrdhC5CQq78mRvimz6A");
         (765952l, "PtJakart2xVj7pYXJBXrqHgd82rdkLey5ZeeGwDgPp9rhQUbSqY");
+        (1191936l, "PtKathmankSpLLDALzWw7CGD2j2MtyveTwboEYokqUCP4a1LxMg");
       ]
     ~default_bootstrap_peers:
       [
@@ -202,41 +165,6 @@ let blockchain_network_ghostnet =
         "ghostnet.visualtez.com";
       ]
 
-let blockchain_network_jakartanet =
-  make_blockchain_network
-    ~alias:"jakartanet"
-    {
-      time = Time.Protocol.of_notation_exn "2022-04-27T15:00:00Z";
-      block =
-        Block_hash.of_b58check_exn
-          "BLockGenesisGenesisGenesisGenesisGenesisbd16dciJxo9";
-      protocol =
-        Protocol_hash.of_b58check_exn
-          "Ps9mPmXaRzmzk35gbAYNCAw6UXdE2qoABTHbN2oEEc1qM7CwT9P";
-    }
-    ~genesis_parameters:
-      {
-        context_key = "sandbox_parameter";
-        values =
-          `O
-            [
-              ( "genesis_pubkey",
-                `String "edpkuYLienS3Xdt5c1vfRX1ibMxQuvfM67ByhJ9nmRYYKGAAoTq1UC"
-              );
-            ];
-      }
-    ~chain_name:"TEZOS_JAKARTANET_2022-04-27T15:00:00Z"
-    ~sandboxed_chain_name:"SANDBOXED_TEZOS"
-    ~user_activated_upgrades:
-      [(8192l, "PtJakart2xVj7pYXJBXrqHgd82rdkLey5ZeeGwDgPp9rhQUbSqY")]
-    ~default_bootstrap_peers:
-      [
-        "jakartanet.teztnets.xyz";
-        "jakartanet.boot.ecadinfra.com";
-        "jakartanet.kaml.fr";
-        "jakartanet.visualtez.com";
-      ]
-
 let blockchain_network_kathmandunet =
   make_blockchain_network
     ~alias:"kathmandunet"
@@ -369,8 +297,6 @@ let builtin_blockchain_networks_with_tags =
   [
     (1, blockchain_network_sandbox);
     (4, blockchain_network_mainnet);
-    (16, blockchain_network_hangzhounet);
-    (18, blockchain_network_jakartanet);
     (19, blockchain_network_ghostnet);
     (20, blockchain_network_kathmandunet);
   ]