diff --git a/src/proto_alpha/lib_client/operation_result.ml b/src/proto_alpha/lib_client/operation_result.ml
index 926c321eed5bfdd6918da9c85e14d8c22b428459..b01b092f19f5f02954ad7bff2e7b3f5fd2797e3d 100644
--- a/src/proto_alpha/lib_client/operation_result.ml
+++ b/src/proto_alpha/lib_client/operation_result.ml
@@ -405,11 +405,11 @@ let pp_manager_operation_content (type kind) source ppf
         Dal.Slot.Header.pp
         slot_header
   | Zk_rollup_origination _ ->
-      Format.fprintf ppf "Zk rollup origination:@,From: %a" Contract.pp source
+      Format.fprintf ppf "Epoxy origination:@,From: %a" Contract.pp source
   | Zk_rollup_publish _ ->
-      Format.fprintf ppf "Zk rollup publish:@,From: %a" Contract.pp source
+      Format.fprintf ppf "Epoxy publish:@,From: %a" Contract.pp source
   | Zk_rollup_update _ ->
-      Format.fprintf ppf "Zk rollup update:@,From: %a" Contract.pp source
+      Format.fprintf ppf "Epoxy update:@,From: %a" Contract.pp source
 
 let pp_balance_updates ppf balance_updates =
   let open Receipt in
@@ -888,9 +888,9 @@ let pp_manager_operation_contents_result ppf op_result =
     | Sc_rollup_recover_bond_result _ -> "smart contract bond retrieval"
     | Dal_publish_slot_header_result _ ->
         "data availability slot header publishing"
-    | Zk_rollup_origination_result _ -> "zk rollup originate"
-    | Zk_rollup_publish_result _ -> "zk rollup publish"
-    | Zk_rollup_update_result _ -> "zk rollup update"
+    | Zk_rollup_origination_result _ -> "epoxy originate"
+    | Zk_rollup_publish_result _ -> "epoxy publish"
+    | Zk_rollup_update_result _ -> "epoxy update"
   in
   let pp_manager_operation_contents_result (type kind) ppf
       (result : kind successful_manager_operation_result) =
diff --git a/src/proto_alpha/lib_protocol/test/helpers/dummy_zk_rollup.ml b/src/proto_alpha/lib_protocol/test/helpers/dummy_zk_rollup.ml
index 0bcd057ff003a25469dcf79e69230e31f39c5b39..e6eb55c04cb9842f2c0d9ff765a5ee104ff4b033 100644
--- a/src/proto_alpha/lib_protocol/test/helpers/dummy_zk_rollup.ml
+++ b/src/proto_alpha/lib_protocol/test/helpers/dummy_zk_rollup.ml
@@ -384,8 +384,10 @@ end = struct
     Hex.to_bytes_exn (`Hex "0002298c03ed7d454a101eb7022bc95f7e5f41ac78")
 
   let dummy_rollup_id =
-    (* zkr1PxS4vgvBsf6XVHRSB7UJKcrTWee8Dp7Wx *)
-    Hex.to_bytes_exn (`Hex "c9a524d4db6514471775c380231afc10f2ef6ba3")
+    let address =
+      Zk_rollup.Address.of_b58check_exn "epx18RJJqrYuJQqhB636BWvukU3XBNQGbtm8C"
+    in
+    Data_encoding.Binary.to_bytes_exn Zk_rollup.Address.encoding address
 
   let dummy_ticket_hash = Bytes.make 32 '0'
 
diff --git a/src/proto_alpha/lib_protocol/test/unit/test_destination_repr.ml b/src/proto_alpha/lib_protocol/test/unit/test_destination_repr.ml
index 07cf5adbc3df8fce62146f55a44047af9e086ffc..f87ae0011b0052d7ec9094eacf1456db370fd573 100644
--- a/src/proto_alpha/lib_protocol/test/unit/test_destination_repr.ml
+++ b/src/proto_alpha/lib_protocol/test/unit/test_destination_repr.ml
@@ -83,7 +83,7 @@ let sc_rollup_address = "scr1HLXM32GacPNDrhHDLAssZG88eWqCUbyLF"
 
 (* TODO: https://gitlab.com/tezos/tezos/-/issues/3731
    Explain how this address was computed *)
-let zk_rollup_address = "zkr1RePaz42fAmoGVGPhRvoVH5zwr3Sz6ZS93"
+let zk_rollup_address = "epx18RJJqrYuJQqhB636BWvukU3XBNQGbtm8C"
 
 let assert_compat contract destination =
   match destination with
@@ -184,13 +184,13 @@ let test_compare_destination () =
   let kt1 = !!(Destination_repr.of_b58check liquidity_baking_dex) in
   let txr1 = !!(Destination_repr.of_b58check tx_rollup_address) in
   let scr1 = !!(Destination_repr.of_b58check sc_rollup_address) in
-  let zkr1 = !!(Destination_repr.of_b58check zk_rollup_address) in
+  let epx1 = !!(Destination_repr.of_b58check zk_rollup_address) in
 
   assert (Destination_repr.(tz1 < kt1)) ;
   assert (Destination_repr.(kt1 < txr1)) ;
   assert (Destination_repr.(tz1 < txr1)) ;
   assert (Destination_repr.(txr1 < scr1)) ;
-  assert (Destination_repr.(scr1 < zkr1)) ;
+  assert (Destination_repr.(scr1 < epx1)) ;
 
   return_unit
 
diff --git a/src/proto_alpha/lib_protocol/zk_rollup_repr.ml b/src/proto_alpha/lib_protocol/zk_rollup_repr.ml
index 2bcb5a871118399c9b587fe76d56ef6dc4ec16c8..52fe03aa9b9a0bb06c59762c466b7fe79eea873b 100644
--- a/src/proto_alpha/lib_protocol/zk_rollup_repr.ml
+++ b/src/proto_alpha/lib_protocol/zk_rollup_repr.ml
@@ -24,11 +24,11 @@
 (*****************************************************************************)
 
 module Address = struct
-  let prefix = "zkr1"
+  let prefix = "epx1"
 
   let encoded_size = 37
 
-  let decoded_prefix = "\001\171\084\251"
+  let decoded_prefix = "\001\023\224\125"
 
   module H =
     Blake2B.Make
diff --git a/src/proto_alpha/lib_protocol/zk_rollup_repr.mli b/src/proto_alpha/lib_protocol/zk_rollup_repr.mli
index 52c028b4af226dfc7badf606279fc9565c546b2f..d36a047fc21f8816b1d4de8ebf6946de083fc050 100644
--- a/src/proto_alpha/lib_protocol/zk_rollup_repr.mli
+++ b/src/proto_alpha/lib_protocol/zk_rollup_repr.mli
@@ -23,7 +23,7 @@
 (*                                                                           *)
 (*****************************************************************************)
 
-(** A ZK rollup has an address starting with "zkr1".
+(** A ZK rollup has an address starting with "epx1".
     ZKRU addresses have a length of 20 bytes, which means
     that they have an injective encoding as BLS12-381 scalars.
 *)