diff --git a/pkgs/development/libraries/libwebsockets/default.nix b/pkgs/development/libraries/libwebsockets/default.nix
index 151d4c7ee48f..777beb9bc14b 100644
--- a/pkgs/development/libraries/libwebsockets/default.nix
+++ b/pkgs/development/libraries/libwebsockets/default.nix
@@ -61,7 +61,7 @@ in {
   };
 
   libwebsockets_4_2 = generic {
-    version = "4.2.0";
-    sha256 = "glnLGXniero/5CW/1TBPZngdOM6gww8DnT5wiX66sW0=";
+    version = "4.2.1";
+    sha256 = "sha256-C+WGfNF4tAgbp/7aRraBgjNOe4I5ihm+8CGelXzfxbU=";
   };
 }