diff --git a/pkgs/development/python-modules/oyaml/default.nix b/pkgs/development/python-modules/oyaml/default.nix
index e445086d0c7..9ea527e06f1 100644
--- a/pkgs/development/python-modules/oyaml/default.nix
+++ b/pkgs/development/python-modules/oyaml/default.nix
@@ -9,13 +9,13 @@
 
 buildPythonPackage rec {
   pname = "oyaml";
-  version = "0.9";
+  version = "1.0";
 
   src = fetchFromGitHub {
     owner = "wimglenn";
     repo = "oyaml";
     rev = "v${version}";
-    sha256 = "13xjdym0p0jh9bvyjsbhi4yznlp68bamy3xi4w5wpcrzlcq6cfh9";
+    sha256 = "0qkj8g87drvjqiqqmz36gyqiczdfcfv8zk96kkifzk4f9dl5f02j";
   };
 
   propagatedBuildInputs = [