diff --git a/pkgs/development/python-modules/arviz/default.nix b/pkgs/development/python-modules/arviz/default.nix
index e30bd77f4ad0b..4005c8668117a 100644
--- a/pkgs/development/python-modules/arviz/default.nix
+++ b/pkgs/development/python-modules/arviz/default.nix
@@ -22,13 +22,13 @@
 
 buildPythonPackage rec {
   pname = "arviz";
-  version = "0.7.0";
+  version = "0.10.0";
 
   src = fetchFromGitHub {
     owner = "arviz-devs";
     repo = "arviz";
-    rev = version;
-    sha256 = "03hj7bkkj6kfqdk6ri2mp53wk4k7xpafxk01vgs6k9zg3rlnq7ny";
+    rev = "v${version}";
+    sha256 = "1cnj972knkvi084cfcpc12lv0wxm8xm9clfd55r3hvv42g1ms5d9";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/xarray/default.nix b/pkgs/development/python-modules/xarray/default.nix
index 344615c901468..d905a11e3418c 100644
--- a/pkgs/development/python-modules/xarray/default.nix
+++ b/pkgs/development/python-modules/xarray/default.nix
@@ -11,11 +11,11 @@
 
 buildPythonPackage rec {
   pname = "xarray";
-  version = "0.16.0";
+  version = "0.16.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1js3xr3fl9bwid8hl3w2pnigqzjd2rvkncald5x1x5fg7wjy8pb6";
+    sha256 = "5e1af056ff834bf62ca57da917159328fab21b1f8c25284f92083016bb2d92a5";
   };
 
   checkInputs = [ pytest ];