diff --git a/pkgs/by-name/py/pyrseas/package.nix b/pkgs/by-name/py/pyrseas/package.nix
index cffc9a7e7c87..85363170de15 100644
--- a/pkgs/by-name/py/pyrseas/package.nix
+++ b/pkgs/by-name/py/pyrseas/package.nix
@@ -13,7 +13,7 @@ let
     src = fetchFromGitHub {
       owner = "perseas";
       repo = "pgdbconn";
-      rev = "v${version}";
+      tag = "v${version}";
       sha256 = "09r4idk5kmqi3yig7ip61r6js8blnmac5n4q32cdcbp1rcwzdn6z";
     };
 
@@ -36,7 +36,7 @@ python3Packages.buildPythonApplication rec {
   src = fetchFromGitHub {
     owner = "perseas";
     repo = "Pyrseas";
-    rev = version;
+    tag = "v${version}";
     sha256 = "sha256-+MxnxvbLMxK1Ak+qKpKe3GHbzzC+XHO0eR7rl4ON9H4=";
   };