diff --git a/pkgs/development/python-modules/monty/default.nix b/pkgs/development/python-modules/monty/default.nix
index ff236d9becc4..73325c24d94c 100644
--- a/pkgs/development/python-modules/monty/default.nix
+++ b/pkgs/development/python-modules/monty/default.nix
@@ -5,6 +5,7 @@
 , msgpack
 , pytestCheckHook
 , numpy
+, pandas
 , pydantic
 , pymongo
 , ruamel_yaml
@@ -13,17 +14,21 @@
 
 buildPythonPackage rec {
   pname = "monty";
-  version = "2021.6.10";
+  version = "2021.8.17";
   disabled = pythonOlder "3.5"; # uses type annotations
 
-  # No tests in Pypi
   src = fetchFromGitHub {
     owner = "materialsvirtuallab";
     repo = pname;
     rev = "v${version}";
-    sha256 = "01fhl4pl5gj4ahph4lxcm0fmglh0bjw6jz9ckmgzviasg4l1j6h4";
+    sha256 = "0lg6d0qk6iv476rcn45p5f50kips5g9s709cxddwnk5yrz57c4d0";
   };
 
+  postPatch = ''
+    substituteInPlace tests/test_os.py \
+      --replace 'self.assertEqual("/usr/bin/find", which("/usr/bin/find"))' '#'
+  '';
+
   propagatedBuildInputs = [
     ruamel_yaml
     tqdm
@@ -33,15 +38,11 @@ buildPythonPackage rec {
   checkInputs = [
     pytestCheckHook
     numpy
+    pandas
     pydantic
     pymongo
   ];
 
-  preCheck = ''
-    substituteInPlace tests/test_os.py \
-      --replace 'self.assertEqual("/usr/bin/find", which("/usr/bin/find"))' '#'
-  '';
-
   meta = with lib; {
     description = "Serves as a complement to the Python standard library by providing a suite of tools to solve many common problems";
     longDescription = "