diff --git a/pkgs/development/python-modules/pymatgen/default.nix b/pkgs/development/python-modules/pymatgen/default.nix
index f9869cc2c7f4..12d9daf5b3d7 100644
--- a/pkgs/development/python-modules/pymatgen/default.nix
+++ b/pkgs/development/python-modules/pymatgen/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "pymatgen";
-  version = "2019.12.22";
+  version = "2020.4.29";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ffc6efcc2ba15bff22cca29c07b93b01fac400f649c41d5dd01bfff7915f80b";
+    sha256 = "cf9c89f2c742acf524f3a778cd269164abf582e87ab5f297cd83802fe00c309d";
   };
 
   nativeBuildInputs = [ glibcLocales ];