diff --git a/modules/nethermind/args.nix b/modules/nethermind/args.nix
index 4925b4f11..d1701c8b3 100644
--- a/modules/nethermind/args.nix
+++ b/modules/nethermind/args.nix
@@ -122,5 +122,14 @@ with lib; {
         description = "If 'true' then Health Check endpoints is enabled at /health";
       };
     };
+
+    # https://docs.nethermind.io/fundamentals/configuration/#sync
+    Sync = {
+      FastSync = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Whether to use the Fast sync mode (the eth/63 synchronization algorithm).";
+      };
+    };
   };
 }
diff --git a/pkgs/nethermind/default.nix b/pkgs/nethermind/default.nix
index 3d22c152b..7266f9000 100644
--- a/pkgs/nethermind/default.nix
+++ b/pkgs/nethermind/default.nix
@@ -12,13 +12,13 @@
 }: let
   self = buildDotnetModule rec {
     pname = "nethermind";
-    version = "1.31.0";
+    version = "1.31.1";
 
     src = fetchFromGitHub {
       owner = "NethermindEth";
       repo = pname;
       rev = version;
-      hash = "sha256-lR/WHOR8idHYr0QDwgNSvaUBaBmEUXlXkXvKrRpxBl8=";
+      hash = "sha256-B86iVpDAztR9zZVBmMhN7M79PfpSXof4ny6iFb5GWpc=";
       fetchSubmodules = true;
     };