diff --git a/CHANGELOG.md b/CHANGELOG.md
index 212de3ab90dc..8ac0f61d1131 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,6 +44,7 @@ All notable changes to this project will be documented in this file.
 - Fix filter suggestions when same filter previously applied
 - Fix MX lookup when using relays with Bamboo.Mua plausible/analytics#4350
 - Fix property filter suggestions 500 error when property hasn't been selected
+- Bamboo.Mua: add Date and Message-ID headers if missing plausible/analytics#4474
 
 ## v2.1.1 - 2024-06-06
 
diff --git a/mix.lock b/mix.lock
index 0d60746b62b7..89c5823716a4 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,7 +1,7 @@
 %{
   "acceptor_pool": {:hex, :acceptor_pool, "1.0.0", "43c20d2acae35f0c2bcd64f9d2bde267e459f0f3fd23dab26485bf518c281b21", [:rebar3], [], "hexpm", "0cbcd83fdc8b9ad2eee2067ef8b91a14858a5883cb7cd800e6fcd5803e158788"},
   "bamboo": {:hex, :bamboo, "2.3.0", "d2392a2cabe91edf488553d3c70638b532e8db7b76b84b0a39e3dfe492ffd6fc", [:mix], [{:hackney, ">= 1.15.2", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.4 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "dd0037e68e108fd04d0e8773921512c940e35d981e097b5793543e3b2f9cd3f6"},
-  "bamboo_mua": {:hex, :bamboo_mua, "0.2.1", "caa7e3d4027b01a71a25267c9f3ebc4f8793ae6313971d7a4cb38010c7d1689d", [:mix], [{:bamboo, "~> 2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:mail, "~> 0.3.0", [hex: :mail, repo: "hexpm", optional: false]}, {:mua, "~> 0.2.3", [hex: :mua, repo: "hexpm", optional: false]}], "hexpm", "0625b32d0d2fcc584c5e967e08b6f02b9d3ca0b28220713458881e6779b31d22"},
+  "bamboo_mua": {:hex, :bamboo_mua, "0.2.2", "c50cd41ef684155669e2d99d428fbb87e13797a80829a162b47d3c0a7f7e7ecd", [:mix], [{:bamboo, "~> 2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:mail, "~> 0.3.0", [hex: :mail, repo: "hexpm", optional: false]}, {:mua, "~> 0.2.3", [hex: :mua, repo: "hexpm", optional: false]}], "hexpm", "5fe6e3676640578c6fe8f040b34dda8991ebef8566c0601a984eb4771b85b11f"},
   "bamboo_phoenix": {:hex, :bamboo_phoenix, "1.0.0", "f3cc591ffb163ed0bf935d256f1f4645cd870cf436545601215745fb9cc9953f", [:mix], [{:bamboo, ">= 2.0.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:phoenix, ">= 1.3.0", [hex: :phoenix, repo: "hexpm", optional: false]}], "hexpm", "6db88fbb26019c84a47994bb2bd879c0887c29ce6c559bc6385fd54eb8b37dee"},
   "bamboo_postmark": {:git, "https://github.com/plausible/bamboo_postmark.git", "5eac6dfdffacd273bd9aacdd3e494a600bb0b170", [branch: "main"]},
   "bamboo_smtp": {:hex, :bamboo_smtp, "4.2.2", "e9f57a2300df9cb496c48751bd7668a86a2b89aa2e79ccaa34e0c46a5f64c3ae", [:mix], [{:bamboo, "~> 2.2.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:gen_smtp, "~> 1.2.0", [hex: :gen_smtp, repo: "hexpm", optional: false]}], "hexpm", "28cac2ec8adaae02aed663bf68163992891a3b44cfd7ada0bebe3e09bed7207f"},