diff --git a/constants.nix b/constants.nix
index 04f7e47..7b33884 100644
--- a/constants.nix
+++ b/constants.nix
@@ -1,6 +1,5 @@
 {
   name = "prefmanager";
-  # GHC 9.6.2 disabled since `fgl` a dependency of `async-pool` fails to build.
   ghcVersions = map (v: "ghc${v}") [ "810" "90" "92" "94" "96" ];
-  defaultGhcVersion = "ghc94";
+  defaultGhcVersion = "ghc96";
 }
diff --git a/flake.lock b/flake.lock
index bcccd6b..41bffda 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,17 +2,17 @@
   "nodes": {
     "devshell": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": [
           "nixpkgs"
-        ],
-        "systems": "systems"
+        ]
       },
       "locked": {
-        "lastModified": 1701787589,
-        "narHash": "sha256-ce+oQR4Zq9VOsLoh9bZT8Ip9PaMLcjjBUHVPzW5d7Cw=",
+        "lastModified": 1711099426,
+        "narHash": "sha256-HzpgM/wc3aqpnHJJ2oDqPBkNsqWbW0WfWUO8lKu8nGk=",
         "owner": "numtide",
         "repo": "devshell",
-        "rev": "44ddedcbcfc2d52a76b64fb6122f209881bd3e1e",
+        "rev": "2d45b54ca4a183f2fdcf4b19c895b64fbf620ee8",
         "type": "github"
       },
       "original": {
@@ -39,7 +39,7 @@
     },
     "flake-utils": {
       "inputs": {
-        "systems": "systems_2"
+        "systems": "systems"
       },
       "locked": {
         "lastModified": 1701680307,
@@ -55,13 +55,31 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1702938738,
-        "narHash": "sha256-O7Vb0xC9s4Dmgxj8APEpuuMj7HsLgPbpy1UKvNVJp7o=",
+        "lastModified": 1711231723,
+        "narHash": "sha256-dARJQ8AJOv6U+sdRePkbcVyVbXJTi1tReCrkkOeusiA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dd8e82f3b4017b8faa52c2b1897a38d53c3c26cb",
+        "rev": "e1d501922fd7351da4200e1275dfcf5faaad1220",
         "type": "github"
       },
       "original": {
@@ -92,7 +110,7 @@
       "inputs": {
         "devshell": "devshell",
         "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
+        "flake-utils": "flake-utils_2",
         "nixpkgs": "nixpkgs",
         "plist-source": "plist-source"
       }
diff --git a/stack.yaml b/stack.yaml
index 47f141b..451f2a2 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,9 +1,8 @@
-# GHC 9.4.8
+# GHC 9.6.4
 # Keep in sync with `defaultGhcVersion` in `./constants.nix`.
-resolver: lts-21.25
+resolver: lts-22.13
 
 extra-deps:
-- async-pool-0.9.2
 - base-noprelude-4.13.0.0
 - patience-0.3
 # Use fork of plist package that supports MonadFail
diff --git a/stack.yaml.lock b/stack.yaml.lock
index d0558ad..a59ec63 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -4,13 +4,6 @@
 #   https://docs.haskellstack.org/en/stable/lock_files
 
 packages:
-- completed:
-    hackage: async-pool-0.9.2@sha256:532b356a3a2d3e6ec848ca266b566f8cf60c52a107f4b2c7e690cdd2b1ae67b2,1605
-    pantry-tree:
-      sha256: 292aaab710c67c190ef87703f7a300a3cad71ee71d2cdf2a9e89d242e866d174
-      size: 443
-  original:
-    hackage: async-pool-0.9.2
 - completed:
     hackage: base-noprelude-4.13.0.0@sha256:3cccbfda38e1422ca5cc436d58858ba51ff9114d2ed87915a6569be11e4e5a90,6842
     pantry-tree:
@@ -38,7 +31,7 @@ packages:
     url: https://github.com/malob/plist/archive/5e22be0933bf9a100868b944fa7a8b1236b99255.tar.gz
 snapshots:
 - completed:
-    sha256: 2fc12a405ab6f7eac73eb11a0ca5ccca0e956bd2848db780c140b7406ff9ebb5
-    size: 640035
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/9.yaml
-  original: lts-21.9
+    sha256: 6f0bea3ba5b07360f25bc886e8cff8d847767557a492a6f7f6dcb06e3cc79ee9
+    size: 712905
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/13.yaml
+  original: lts-22.13