diff --git a/changelog.d/cowboy-2.19.0.security b/changelog.d/cowboy-2.19.0.security
new file mode 100644
index 000000000..386236074
--- /dev/null
+++ b/changelog.d/cowboy-2.19.0.security
@@ -0,0 +1 @@
+Update cowboy to version 2.19.0 which fixes a memory exhaustion DoS
diff --git a/mix.lock b/mix.lock
index 1fe858e8d..61bb643c8 100644
--- a/mix.lock
+++ b/mix.lock
@@ -20,7 +20,7 @@
   "connection": {:hex, :connection, "1.1.0", "ff2a49c4b75b6fb3e674bfc5536451607270aac754ffd1bdfe175abe4a6d7a68", [:mix], [], "hexpm", "722c1eb0a418fbe91ba7bd59a47e28008a189d47e37e0e7bb85585a016b2869c"},
   "cors_plug": {:hex, :cors_plug, "2.0.3", "316f806d10316e6d10f09473f19052d20ba0a0ce2a1d910ddf57d663dac402ae", [:mix], [{:plug, "~> 1.8", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "ee4ae1418e6ce117fc42c2ba3e6cbdca4e95ecd2fe59a05ec6884ca16d469aea"},
   "covertool": {:hex, :covertool, "2.0.7", "398be995c4cf1a2861174389b3577ca97beee43b60c8f1afcf510f1b07d32408", [:rebar3], [], "hexpm", "46158ed6e1a0df7c0a912e314c7b8e053bd74daa5fc6b790614922a155b5720c"},
-  "cowboy": {:hex, :cowboy, "2.16.1", "fa04080b602ff25c40a7700f2dc0152dbc1ba26b42093ae0fa9bb7a337d5a242", [:make, :rebar3], [{:cowlib, ">= 2.16.0 and < 3.0.0", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, ">= 1.8.0 and < 3.0.0", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm", "b8ea4dd317a043e3177ec840cfa3bcb47cfb41035d3abb24d954dc7d51def399"},
+  "cowboy": {:hex, :cowboy, "2.19.0", "78b9d92d25a23e56d7341040b67946c04067cd77de966e2372865f673a8e6f59", [:make, :rebar3], [{:cowlib, ">= 2.20.0 and < 3.0.0", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, ">= 1.8.0 and < 3.0.0", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm", "986dae81f99fcb78ef2d8efc21d738cee189410840eeaf32eca84ada81dcf6d4"},
   "cowboy_telemetry": {:hex, :cowboy_telemetry, "0.4.0", "f239f68b588efa7707abce16a84d0d2acf3a0f50571f8bb7f56a15865aae820c", [:rebar3], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "7d98bac1ee4565d31b62d59f8823dfd8356a169e7fcbb83831b8a5397404c9de"},
   "cowlib": {:hex, :cowlib, "2.20.0", "bb525377ba634cd6d68bac7bff5d98571f738806139d335daca827717c5dc172", [:make, :rebar3], [], "hexpm", "7d41a0dd2c093041ff3779ac5fe8a1585a68ec7cb2dd1de0536bdd2452fd7ba1"},
   "credo": {:hex, :credo, "1.7.12", "9e3c20463de4b5f3f23721527fcaf16722ec815e70ff6c60b86412c695d426c1", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "8493d45c656c5427d9c729235b99d498bd133421f3e0a683e5c1b561471291e5"},