diff --git a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
index 33b408240fc6..944a2cf08e09 100644
--- a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
@@ -41,5 +41,7 @@ buildPythonPackage rec {
     homepage = "https://github.com/kvesteri/sqlalchemy-continuum/";
     description = "Versioning and auditing extension for SQLAlchemy";
     license = licenses.bsd3;
+    # https://github.com/kvesteri/sqlalchemy-continuum/issues/255
+    broken = lib.versionAtLeast sqlalchemy.version "1.4";
   };
 }