diff --git a/pkgs/development/python-modules/optuna/default.nix b/pkgs/development/python-modules/optuna/default.nix
index aa61b18291d..78694618f73 100644
--- a/pkgs/development/python-modules/optuna/default.nix
+++ b/pkgs/development/python-modules/optuna/default.nix
@@ -30,14 +30,14 @@
 
 buildPythonPackage rec {
   pname = "optuna";
-  version = "0.19.0";
+  version = "2.6.0";
   disabled = isPy27;
 
   src = fetchFromGitHub {
     owner = "optuna";
     repo = pname;
     rev = "v${version}";
-    sha256 = "179x2lsckpmkrkkdnvvbzky86g1ba882z677qwbayhsc835wbp0y";
+    sha256 = "11mskhb7i55i04cy0vkxi7kpaifbz8zc2m8x9s5y6yyyjinvly36";
   };
 
   checkInputs = [