diff --git a/flake.lock b/flake.lock
index d581552e..17916896 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1623346302,
-        "narHash": "sha256-q7xcIJfXs3ISHHAn0JWyhzmvLxtUPmble03S5lfy7yI=",
+        "lastModified": 1623432014,
+        "narHash": "sha256-4KKLgus7pP0sWchUw492AacsYS6kdmG9wce61ICzihw=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "de312c1974ae88097db7355f128f3f8b6847c7b8",
+        "rev": "a002c6d3cd4f1ddb876cb8fb0e2adc9d95215c6d",
         "type": "github"
       },
       "original": {
@@ -54,11 +54,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1623238380,
-        "narHash": "sha256-c13ZBZX1axBB9Z+3XJ59xmgaNcGpc4fF2lpLwUU1MDU=",
+        "lastModified": 1623364030,
+        "narHash": "sha256-zamIk2U9RM87cM5kxIk6RTlwGUtdTJ5EkZr+xISb16s=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3fcf9a6af852942cfb3319f7efc5cd11a9bae794",
+        "rev": "6a1ca229f5d811fc3fce512206d1eeb2ba7182c4",
         "type": "github"
       },
       "original": {
diff --git a/modules/accentor.nix b/modules/accentor.nix
index 36f1596d..abc89290 100644
--- a/modules/accentor.nix
+++ b/modules/accentor.nix
@@ -24,7 +24,7 @@ let
     owner = "accentor";
     repo = "api";
     rev = "develop";
-    sha256 = "1pm8zmf1q6gxjl6swqi103gpac27nc3v2q6xwyq2jkf8ql71jarj";
+    sha256 = "0pv4j4v76jx7hhkd58fh55b3icmwhb7pmrkyaqcwxqrlirqmfabd";
   };
   gems = pkgs.bundlerEnv {
     name = "accentor-api-env";
diff --git a/modules/accentor/Gemfile b/modules/accentor/Gemfile
index c75f2396..df5cdd83 100644
--- a/modules/accentor/Gemfile
+++ b/modules/accentor/Gemfile
@@ -5,8 +5,6 @@ ruby '2.7.3'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.1'
-# Keep this low enough until https://github.com/rack/rack/issues/1619 is fixed
-gem 'rack', '~> 2.1.4'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 1.2.3', '< 2.0'
 # Use Puma as the app server
diff --git a/modules/accentor/Gemfile.lock b/modules/accentor/Gemfile.lock
index 33a4d250..aaaba4c1 100644
--- a/modules/accentor/Gemfile.lock
+++ b/modules/accentor/Gemfile.lock
@@ -137,7 +137,7 @@ GEM
     pundit (2.1.0)
       activesupport (>= 3.0.0)
     racc (1.5.2)
-    rack (2.1.4)
+    rack (2.2.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-test (1.1.0)
@@ -244,7 +244,6 @@ DEPENDENCIES
   pg (>= 1.2.3, < 2.0)
   puma (~> 5.3)
   pundit (~> 2.1)
-  rack (~> 2.1.4)
   rack-cors (~> 1.1)
   rails (~> 6.1)
   rubocop-minitest (~> 0.12.1)
diff --git a/modules/accentor/gemset.nix b/modules/accentor/gemset.nix
index 43499659..21df6cce 100644
--- a/modules/accentor/gemset.nix
+++ b/modules/accentor/gemset.nix
@@ -598,10 +598,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1x72abm2snhk664s9g642pxjyk911y39qck8n9hbnqmb7ba1zbmz";
+      sha256 = "0i5vs0dph9i5jn8dfc6aqd6njcafmb20rwqngrf759c9cvmyff16";
       type = "gem";
     };
-    version = "2.1.4";
+    version = "2.2.3";
   };
   rack-cors = {
     dependencies = [ "rack" ];