diff --git a/pkgs/development/python-modules/energyflow/default.nix b/pkgs/development/python-modules/energyflow/default.nix
index 41657d403018..7308d0289023 100644
--- a/pkgs/development/python-modules/energyflow/default.nix
+++ b/pkgs/development/python-modules/energyflow/default.nix
@@ -10,13 +10,13 @@
 
 buildPythonPackage rec {
   pname = "energyflow";
-  version = "1.3.2";
+  version = "1.3.3";
 
   src = fetchFromGitHub {
     owner = "pkomiske";
     repo = "EnergyFlow";
-    rev = "v${version}";
-    hash = "sha256-fjT8c0ZTjdufP334upPzRVdTJDIBs84I7PkFu4CMcQw=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-Ioyk0IpyxcDdL2+3zkUa6yydavyphoh4do7GCz5nG60=";
   };
 
   postPatch = ''