diff --git a/pkgs/development/libraries/libressl/default.nix b/pkgs/development/libraries/libressl/default.nix
index 7a2718c01539..4f924565a58c 100644
--- a/pkgs/development/libraries/libressl/default.nix
+++ b/pkgs/development/libraries/libressl/default.nix
@@ -91,7 +91,7 @@ in {
     sha256 = "112bjfrwwqlk0lak7fmfhcls18ydf62cp7gxghf4gklpfl1zyckw";
   };
   libressl_3_4 = generic {
-    version = "3.4.2";
-    sha256 = "sha256-y4LKfVRzNpFzUvvSPbL8SDxsRNNRV7MngCFOx0GXs84=";
+    version = "3.4.3";
+    sha256 = "sha256-/4i//jVIGLPM9UXjyv5FTFAxx6dyFwdPUzJx1jw38I0=";
   };
 }