diff --git a/pkgs/development/python-modules/bayesian-optimization/default.nix b/pkgs/development/python-modules/bayesian-optimization/default.nix
index 9174b25f6b3a..a1739bf4773e 100644
--- a/pkgs/development/python-modules/bayesian-optimization/default.nix
+++ b/pkgs/development/python-modules/bayesian-optimization/default.nix
@@ -9,13 +9,13 @@
 
 buildPythonPackage rec {
   pname = "bayesian-optimization";
-  version = "1.1.0";
+  version = "1.2.0";
 
   src = fetchFromGitHub {
     owner = "fmfn";
     repo = "BayesianOptimization";
-    rev = "v${version}";
-    sha256 = "0ylip9xdi0cjzmdayxxpazdfaa9dl0sdcl2qsfn3p0cipj59bdvd";
+    rev = version;
+    sha256 = "01mg9npiqh1qmq5ldnbpjmr8qkiw827msiv3crpkhbj4bdzasbfm";
   };
 
   propagatedBuildInputs = [