diff --git a/pkgs/development/libraries/botan/unstable.nix b/pkgs/development/libraries/botan/unstable.nix
index cc18b8c63ab..f979fb8a959 100644
--- a/pkgs/development/libraries/botan/unstable.nix
+++ b/pkgs/development/libraries/botan/unstable.nix
@@ -2,7 +2,7 @@
 
 callPackage ./generic.nix (args // {
   baseVersion = "1.11";
-  revision = "13";
-  sha256 = "1jg36k376w6d6g7hgs2d67sr84pail5qf6yy1s5ys7pc16k2dy41";
+  revision = "10";
+  sha256 = "06d5p0bs953r2pqfc635x2w78m3xv28gr6fmvd8whbk9qp8r91yb";
   openssl = null;
 })