diff --git a/pkgs/by-name/bo/boost-sml/package.nix b/pkgs/by-name/bo/boost-sml/package.nix
index 2aa88070e2b8..e81743e03d74 100644
--- a/pkgs/by-name/bo/boost-sml/package.nix
+++ b/pkgs/by-name/bo/boost-sml/package.nix
@@ -8,13 +8,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "boost-sml";
-  version = "1.1.13";
+  version = "1.2.0";
 
   src = fetchFromGitHub {
     owner = "boost-ext";
     repo = "sml";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-VgJl09kCRCXBF/IraVbAVowrrMJH0NFcblQAKVQwl6w=";
+    hash = "sha256-cQRLBqe5TudtISko309mF9Qx7r5Q8L2Z9myvvYyh8NY=";
   };
 
   buildInputs = [ boost ];