diff --git a/mix.exs b/mix.exs
index b4ea986b3..78443ca83 100644
--- a/mix.exs
+++ b/mix.exs
@@ -96,7 +96,7 @@ defmodule GroupherServer.Mixfile do
       # mailer
       {:bamboo, "1.3.0"},
       # mem cache
-      {:cachex, "3.3.0"},
+      {:cachex, "3.4.0"},
       # postgres-backed job queue
       {:rihanna, "1.3.5"},
       # cron-like scheduler job
diff --git a/mix.lock b/mix.lock
index 1e80ecb3c..54032a8ff 100644
--- a/mix.lock
+++ b/mix.lock
@@ -8,7 +8,7 @@
   "bamboo": {:hex, :bamboo, "1.3.0", "9ab7c054f1c3435464efcba939396c29c5e1b28f73c34e1f169e0881297a3141", [:mix], [{:hackney, ">= 1.13.0", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "e1197188512d4a4458eaaad9a1659ce9eeb54a1b41574a9cd7507217b33e0f3e"},
   "base64url": {:hex, :base64url, "0.0.1", "36a90125f5948e3afd7be97662a1504b934dd5dac78451ca6e9abf85a10286be", [:rebar], [], "hexpm", "fab09b20e3f5db886725544cbcf875b8e73ec93363954eb8a1a9ed834aa8c1f9"},
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm", "7af5c7e09fe1d40f76c8e4f9dd2be7cebd83909f31fee7cd0e9eadc567da8353"},
-  "cachex": {:hex, :cachex, "3.3.0", "6f2ebb8f27491fe39121bd207c78badc499214d76c695658b19d6079beeca5c2", [:mix], [{:eternal, "~> 1.2", [hex: :eternal, repo: "hexpm", optional: false]}, {:jumper, "~> 1.0", [hex: :jumper, repo: "hexpm", optional: false]}, {:sleeplocks, "~> 1.1", [hex: :sleeplocks, repo: "hexpm", optional: false]}, {:unsafe, "~> 1.0", [hex: :unsafe, repo: "hexpm", optional: false]}], "hexpm", "d90e5ee1dde14cef33f6b187af4335b88748b72b30c038969176cd4e6ccc31a1"},
+  "cachex": {:hex, :cachex, "3.4.0", "868b2959ea4aeb328c6b60ff66c8d5123c083466ad3c33d3d8b5f142e13101fb", [:mix], [{:eternal, "~> 1.2", [hex: :eternal, repo: "hexpm", optional: false]}, {:jumper, "~> 1.0", [hex: :jumper, repo: "hexpm", optional: false]}, {:sleeplocks, "~> 1.1", [hex: :sleeplocks, repo: "hexpm", optional: false]}, {:unsafe, "~> 1.0", [hex: :unsafe, repo: "hexpm", optional: false]}], "hexpm", "370123b1ab4fba4d2965fb18f87fd758325709787c8c5fce35b3fe80645ccbe5"},
   "certifi": {:hex, :certifi, "2.6.1", "dbab8e5e155a0763eea978c913ca280a6b544bfa115633fa20249c3d396d9493", [:rebar3], [], "hexpm", "524c97b4991b3849dd5c17a631223896272c6b0af446778ba4675a1dff53bb7e"},
   "combine": {:hex, :combine, "0.10.0", "eff8224eeb56498a2af13011d142c5e7997a80c8f5b97c499f84c841032e429f", [:mix], [], "hexpm", "1b1dbc1790073076580d0d1d64e42eae2366583e7aecd455d1215b0d16f2451b"},
   "comeonin": {:hex, :comeonin, "5.3.2", "5c2f893d05c56ae3f5e24c1b983c2d5dfb88c6d979c9287a76a7feb1e1d8d646", [:mix], [], "hexpm", "d0993402844c49539aeadb3fe46a3c9bd190f1ecf86b6f9ebd71957534c95f04"},