diff --git a/pkgs/development/libraries/libunistring/default.nix b/pkgs/development/libraries/libunistring/default.nix
index f7a77832c183..01b302abd68e 100644
--- a/pkgs/development/libraries/libunistring/default.nix
+++ b/pkgs/development/libraries/libunistring/default.nix
@@ -7,11 +7,11 @@
 
 stdenv.mkDerivation rec {
   pname = "libunistring";
-  version = "0.9.10";
+  version = "1.0";
 
   src = fetchurl {
     url = "mirror://gnu/libunistring/${pname}-${version}.tar.gz";
-    sha256 = "02v17za10mxnj095x4pvm80jxyqwk93kailfc2j8xa1r6crmnbm8";
+    sha256 = "sha256-PAGEwOSS18IIzjHSXdHSxY8MPtbLvgMsWySM3a0xhUQ=";
   };
 
   outputs = [ "out" "dev" "info" "doc" ];