diff --git a/flake.lock b/flake.lock
index 9636a1a..0d86651 100644
--- a/flake.lock
+++ b/flake.lock
@@ -43,11 +43,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1773561580,
-        "narHash": "sha256-wT0bKTp45YnMkc4yXQvk943Zz/rksYiIjEXGdWzxnic=",
+        "lastModified": 1774239543,
+        "narHash": "sha256-ZZ7V6xN0ATIHibLyaDBhmUGOqLqQzxuTx1ekOGCvLHI=",
         "owner": "openclaw",
         "repo": "nix-steipete-tools",
-        "rev": "cd4c429ff3b3aaef9f92e59812cf2baf5704b86f",
+        "rev": "5f677a283da837cad26c1ce982d85ee181085fc6",
         "type": "github"
       },
       "original": {
diff --git a/nix/generated/openclaw-config-options.nix b/nix/generated/openclaw-config-options.nix
index a380809..224a444 100644
--- a/nix/generated/openclaw-config-options.nix
+++ b/nix/generated/openclaw-config-options.nix
@@ -1,4 +1,4 @@
-# Generated from upstream OpenClaw schema at rev fa6e6603fa538df87f9a2ab5fad251d5c28ce48d. DO NOT EDIT.
+# Generated from upstream OpenClaw schema at rev c441db7e13cd822b32b4447bceb3e24d0c33cb68. DO NOT EDIT.
 # Generator: nix/scripts/generate-config-options.ts
 { lib }:
 let
@@ -5131,6 +5131,10 @@ in
         }; });
           default = null;
         };
+        contextTokens = lib.mkOption {
+          type = t.nullOr (t.int);
+          default = null;
+        };
         contextWindow = lib.mkOption {
           type = t.nullOr (t.number);
           default = null;
diff --git a/nix/packages/openclaw-app.nix b/nix/packages/openclaw-app.nix
index 96a0794..d429239 100644
--- a/nix/packages/openclaw-app.nix
+++ b/nix/packages/openclaw-app.nix
@@ -6,11 +6,11 @@
 
 stdenvNoCC.mkDerivation {
   pname = "openclaw-app";
-  version = "2026.3.13-beta.1";
+  version = "2026.4.2";
 
   src = fetchzip {
-    url = "https://github.com/openclaw/openclaw/releases/download/v2026.3.13-beta.1/OpenClaw-2026.3.13.zip";
-    hash = "sha256-V2raRMaD0dzBgJNaV6JEbaihuOu0GIUWdEnyzNxJefg=";
+    url = "https://github.com/openclaw/openclaw/releases/download/v2026.4.2/OpenClaw-2026.4.2.zip";
+    hash = "sha256-srxXVwtRGBunCEnFRfJFEd2+TjB8o5IzDGIh9yphUZE=";
     stripRoot = false;
   };
 
diff --git a/nix/sources/openclaw-source.nix b/nix/sources/openclaw-source.nix
index c31bae1..3e6ca5d 100644
--- a/nix/sources/openclaw-source.nix
+++ b/nix/sources/openclaw-source.nix
@@ -2,7 +2,7 @@
 {
   owner = "openclaw";
   repo = "openclaw";
-  rev = "fa6e6603fa538df87f9a2ab5fad251d5c28ce48d";
-  hash = "sha256-fhsagBRgwdSo6uHnxevY83+2L3OD5IYQtVgrI3QyF6Y=";
+  rev = "c441db7e13cd822b32b4447bceb3e24d0c33cb68";
+  hash = "sha256-yuhqzR5kXcY274IsofC7ROHBp2iMgeUDhefrrhsUmXQ=";
   pnpmDepsHash = "sha256-sLAnnYTRU0ilkNFbT+WUhAZAIGxlgN9fNofYg9+/odE=";
 }