diff --git a/flake.lock b/flake.lock
index d2796a6..ce8f5f7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1773451814,
-        "narHash": "sha256-ncqkZfGjNMNjnUHyBPqPCuM1IdlfbP+PTDw4eoJwbYM=",
+        "lastModified": 1773804142,
+        "narHash": "sha256-XiW/Tsauyig4Oog1yjxBAzTfO8HAiwtpT0uLh4QpVJ8=",
         "owner": "ryoppippi",
         "repo": "claude-code-overlay",
-        "rev": "0d9fb590af016130d71cf810ade72cdd7ab60f4c",
+        "rev": "292f18fd1be3376acfa7e7238e4f5b4607700cd9",
         "type": "github"
       },
       "original": {
@@ -66,11 +66,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1773666768,
-        "narHash": "sha256-7XvLaFMQOsfWrK+msO0Oqe5CeNYsAlSGjrl5y14gA6w=",
+        "lastModified": 1773681856,
+        "narHash": "sha256-+bRqxoFCJFO9ZTFhcCkzNXbDT3b8AEk88fyjB7Is6eo=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "ca53f083dbd4c83dd5dca8a3099374708e155c32",
+        "rev": "57d5560ee92a424fb71fde800acd6ed2c725dfce",
         "type": "github"
       },
       "original": {
@@ -107,11 +107,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1773619513,
-        "narHash": "sha256-2xCVm8ajE9pNngv489dPKOUa5P0tlmJRwgVPjhy7c8w=",
+        "lastModified": 1773792437,
+        "narHash": "sha256-xjL22RjFqfN3D4dglBt0PTEFLl1rvN60f6LtHX8kQJs=",
         "owner": "nix-community",
         "repo": "neovim-nightly-overlay",
-        "rev": "07227cc79efb9c1744ec99d51f98c7a3584a62d2",
+        "rev": "7f54fc34e0ff994dff6494f074979ad6e4a0eba4",
         "type": "github"
       },
       "original": {
@@ -123,11 +123,11 @@
     "neovim-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1773615769,
-        "narHash": "sha256-qU71k2BTckpJDHpjxaU4aQwl14+iApnAycq+IJDTmO0=",
+        "lastModified": 1773789001,
+        "narHash": "sha256-V4hVxVeHk+ZdlaRpssBu6q9G3++WwxBco5MZVTL9E/I=",
         "owner": "neovim",
         "repo": "neovim",
-        "rev": "16f7440cc7b59b7e5c79f593fedc117d2d16d7dd",
+        "rev": "1d776d909f54dd6298710d50f72e25972b6755bf",
         "type": "github"
       },
       "original": {
@@ -169,11 +169,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1773507054,
-        "narHash": "sha256-Q8U5VXgrcxmCxPtCCJCIZkcAX3FCZwGh1GNVIXxMND0=",
+        "lastModified": 1773628058,
+        "narHash": "sha256-hpXH0z3K9xv0fHaje136KY872VT2T5uwxtezlAskQgY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e80236013dc8b77aa49ca90e7a12d86f5d8d64c9",
+        "rev": "f8573b9c935cfaa162dd62cc9e75ae2db86f85df",
         "type": "github"
       },
       "original": {
@@ -185,11 +185,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1773597492,
-        "narHash": "sha256-hQ284SkIeNaeyud+LS0WVLX+WL2rxcVZLFEaK0e03zg=",
+        "lastModified": 1773628058,
+        "narHash": "sha256-hpXH0z3K9xv0fHaje136KY872VT2T5uwxtezlAskQgY=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "a07d4ce6bee67d7c838a8a5796e75dff9caa21ef",
+        "rev": "f8573b9c935cfaa162dd62cc9e75ae2db86f85df",
         "type": "github"
       },
       "original": {
@@ -232,11 +232,11 @@
         "nixpkgs": "nixpkgs_4"
       },
       "locked": {
-        "lastModified": 1773661718,
-        "narHash": "sha256-MYm1EKp/gbBi9wMEf7Lx0agIVnej/P61sg97EruWzrU=",
+        "lastModified": 1773737882,
+        "narHash": "sha256-P6k0BtT1/idYveVRdcwAZk8By9UjZW8XOMhSoS6wTBY=",
         "owner": "0xc000022070",
         "repo": "zen-browser-flake",
-        "rev": "3ac6ea223b32ff63c45e3577712df991a35aaf33",
+        "rev": "a7f1db35d74faf04e5189b3a32f890186ace5c28",
         "type": "github"
       },
       "original": {
diff --git a/home/modules/shell.nix b/home/modules/shell.nix
index 60a338f..0ef9060 100644
--- a/home/modules/shell.nix
+++ b/home/modules/shell.nix
@@ -209,13 +209,13 @@ in
 
   programs.zsh = {
     enable = true;
-    dotDir = "${config.xdg.configHome}/zsh";
+    dotDir = ".config/zsh";
     completionInit = "";
 
     history = {
       path = "${config.xdg.stateHome}/zsh_history";
-      size = 2000;
-      save = 2000;
+      size = 50000;
+      save = 50000;
       ignoreDups = true;
       ignoreAllDups = true;
       ignoreSpace = true;
diff --git a/hosts/xps15/configuration.nix b/hosts/xps15/configuration.nix
index 2d0b521..bacd0ed 100644
--- a/hosts/xps15/configuration.nix
+++ b/hosts/xps15/configuration.nix
@@ -47,6 +47,12 @@ in
     "quiet"
   ];
 
+  boot.kernel.sysctl = {
+    "net.ipv4.ipfrag_time" = 3;
+    "net.ipv4.ipfrag_high_thresh" = 134217728;
+    "net.core.rmem_max" = 2147483647;
+  };
+
   networking.hostName = "xps15";
   networking.wireless.iwd = {
     enable = true;