diff --git a/pkgs/development/libraries/libressl/default.nix b/pkgs/development/libraries/libressl/default.nix
index 4818a720a30c..ae03ef7ecb97 100644
--- a/pkgs/development/libraries/libressl/default.nix
+++ b/pkgs/development/libraries/libressl/default.nix
@@ -33,7 +33,7 @@ in {
   };
 
   libressl_2_6 = generic {
-    version = "2.6.2";
-    sha256 = "0y64grb2zx98rjp2lbwihyhbml4z5ih3v7ydbxdvmabj5d4x4adh";
+    version = "2.6.4";
+    sha256 = "07yi37a2ghsgj2b4w30q1s4d2inqnix7ika1m21y57p9z71212k3";
   };
 }