diff --git a/mix.exs b/mix.exs
index 130933cec84c1696ff3e9f410517eaf74ba07bad..2c7c68ac3ffeeb9749e646dd00b93e237f09b445 100644
--- a/mix.exs
+++ b/mix.exs
@@ -73,7 +73,7 @@ defmodule Plausible.MixProject do
       {:bamboo, "~> 2.0"},
       {:hackney, "~> 1.8"},
       {:bamboo_phoenix, "~> 1.0.0"},
-      {:bamboo_postmark, "~> 0.5"},
+      {:bamboo_postmark, git: "https://github.com/pablo-co/bamboo_postmark.git", tag: "master"},
       {:bamboo_smtp, "~> 4.0"},
       {:sentry, "~> 8.0"},
       {:httpoison, "~> 1.4"},
diff --git a/mix.lock b/mix.lock
index ff886c9835b11faeeb7b6cbdc8d55acf65c05fbe..ecae8acabc3ec74867ffc33515a575a66fbbc381 100644
--- a/mix.lock
+++ b/mix.lock
@@ -4,7 +4,7 @@
   "appsignal_plug": {:hex, :appsignal_plug, "2.0.4", "3523ec69090478683bee7ce027280fa7d38342865705c676de3798b165431f93", [:mix], [{:appsignal, "~> 2.0.0", [hex: :appsignal, repo: "hexpm", optional: false]}, {:plug, ">= 1.1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "a644b01e6f28be22413c96950e941d2bc5aecbc336d9285b95d9d282d92283ac"},
   "bamboo": {:hex, :bamboo, "2.0.2", "0e2914d2bea0de3b1743384c24ffbe20fbb58094376a49f1cf5d9ed9959abd82", [:mix], [{:hackney, ">= 1.15.2", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.4", [hex: :mime, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "058d57cf4fcdac19413aa72732eb43c88954fb151a1cb6a382014e0cddbf6314"},
   "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": {:hex, :bamboo_postmark, "0.7.0", "94aca03f1d955d2c709c9c89199fbd66ba9892e6d6328ac9e9866d2602ada248", [:mix], [{:bamboo, ">= 1.4.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:hackney, ">= 1.6.5", [hex: :hackney, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "08242961abdde5073b04d6786ef4f20dd9b63c0135a1f398756c9675ca0e2557"},
+  "bamboo_postmark": {:git, "https://github.com/pablo-co/bamboo_postmark.git", "c85189f1775d1804a759441416bd7fce3e804885", [tag: "master"]},
   "bamboo_smtp": {:hex, :bamboo_smtp, "4.0.0", "0cc7df161d5d440d280a6d2eb20bf80bc45ea77161728a229e5ab339dcd087cd", [:mix], [{:bamboo, "~> 2.0.0", [hex: :bamboo, repo: "hexpm", optional: false]}, {:gen_smtp, "~> 1.1.0", [hex: :gen_smtp, repo: "hexpm", optional: false]}], "hexpm", "2412015092121b9f24f3f2e654bcd98e5c5f9afb323a94f8defa22e70ba8f23d"},
   "bcrypt_elixir": {:hex, :bcrypt_elixir, "2.3.0", "6cb662d5c1b0a8858801cf20997bd006e7016aa8c52959c9ef80e0f34fb60b7a", [:make, :mix], [{:comeonin, "~> 5.3", [hex: :comeonin, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "2c81d61d4f6ed0e5cf7bf27a9109b791ff216a1034b3d541327484f46dd43769"},
   "bertex": {:hex, :bertex, "1.3.0", "0ad0df9159b5110d9d2b6654f72fbf42a54884ef43b6b651e6224c0af30ba3cb", [:mix], [], "hexpm", "0a5d5e478bb5764b7b7bae37cae1ca491200e58b089df121a2fe1c223d8ee57a"},
@@ -52,7 +52,7 @@
   "junit_formatter": {:hex, :junit_formatter, "3.1.0", "3f69c61c5413750f9c45e367d77aabbeac9b395acf478d8e70b4ee9d1989c709", [:mix], [], "hexpm", "da52401a93f711fc4f77ffabdda68f9a16fcad5d96f5fce4ae606ab1d73b72f4"},
   "kaffy": {:hex, :kaffy, "0.9.0", "bef34c9729f6a3af4d0dea8eede8bcb9e11371a83ac9a8b393991bce81839517", [:mix], [{:ecto, "~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:phoenix, "~> 1.4", [hex: :phoenix, repo: "hexpm", optional: false]}, {:phoenix_html, "~> 2.11", [hex: :phoenix_html, repo: "hexpm", optional: false]}], "hexpm", "d18ff57b8e68feb433aed11e71510cd357abc7034e75358af5deff7d0d4c6ed3"},
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},
-  "mime": {:hex, :mime, "1.5.0", "203ef35ef3389aae6d361918bf3f952fa17a09e8e43b5aa592b93eba05d0fb8d", [:mix], [], "hexpm", "55a94c0f552249fc1a3dd9cd2d3ab9de9d3c89b559c2bd01121f824834f24746"},
+  "mime": {:hex, :mime, "1.6.0", "dabde576a497cef4bbdd60aceee8160e02a6c89250d6c0b29e56c0dfb00db3d2", [:mix], [], "hexpm", "31a1a8613f8321143dde1dafc36006a17d28d02bdfecb9e95a880fa7aabd19a7"},
   "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm", "f278585650aa581986264638ebf698f8bb19df297f66ad91b18910dfc6e19323"},
   "mix_test_watch": {:hex, :mix_test_watch, "1.0.2", "34900184cbbbc6b6ed616ed3a8ea9b791f9fd2088419352a6d3200525637f785", [:mix], [{:file_system, "~> 0.2.1 or ~> 0.3", [hex: :file_system, repo: "hexpm", optional: false]}], "hexpm", "47ac558d8b06f684773972c6d04fcc15590abdb97aeb7666da19fcbfdc441a07"},
   "mmdb2_decoder": {:hex, :mmdb2_decoder, "3.0.0", "54828676a36e75e9a25bc9a0bb0598d4c7fcc767bf0b40674850b22e05b7b6cc", [:mix], [], "hexpm", "359dc9242915538d1dceb9f6d96c72201dca76ce62e49d22e2ed1e86f20bea8e"},