diff --git a/terrarium/dl_repmanager/dl_repmanager/package_meta_reader.py b/terrarium/dl_repmanager/dl_repmanager/package_meta_reader.py
index d9d930f96..33e7c4f6f 100644
--- a/terrarium/dl_repmanager/dl_repmanager/package_meta_reader.py
+++ b/terrarium/dl_repmanager/dl_repmanager/package_meta_reader.py
@@ -158,6 +158,9 @@ def update_mypy_common(self, to_update: dict[str, str]) -> bool:
                 section[k] = v
         return changes
 
+    def update_package_name(self, new_name: str) -> None:
+        self.toml_writer.set_text_value(section_name=self._SECTION_NAME_MAIN, key="name", value=new_name)
+
 
 @attr.s
 class PackageMetaIOFactory:
diff --git a/terrarium/dl_repmanager/dl_repmanager/repository_manager.py b/terrarium/dl_repmanager/dl_repmanager/repository_manager.py
index 75759c28a..ea30226b1 100644
--- a/terrarium/dl_repmanager/dl_repmanager/repository_manager.py
+++ b/terrarium/dl_repmanager/dl_repmanager/repository_manager.py
@@ -4,7 +4,6 @@
 import re
 from typing import (
     Callable,
-    Collection,
     Mapping,
     Optional,
     Sequence,
@@ -14,6 +13,7 @@
 
 from dl_repmanager.fs_editor import FilesystemEditor
 from dl_repmanager.package_index import PackageIndex
+from dl_repmanager.package_meta_reader import PackageMetaIOFactory
 from dl_repmanager.package_reference import PackageReference
 from dl_repmanager.primitives import (
     LocaleDomainSpec,
@@ -340,18 +340,10 @@ def _rename_package_internals(self, old_package_info: PackageInfo, new_package_i
                 exclude_masks=edit_exclude_masks,
             )
 
-        # add `-` to the regex
-        regex, repl = self._make_regex_and_repl_for_sub(
-            old_str=old_package_info.package_reg_name,
-            new_str=new_package_info.package_reg_name,
-            allow_dash=False,
-        )
-        self.fs_editor.replace_regex_in_dir(
-            regex=regex,
-            repl=repl,
-            path=new_pkg_dir,
-            exclude_masks=edit_exclude_masks,
-        )
+        # Update reg name
+        pkg_meta_io_factory = PackageMetaIOFactory(fs_editor=self.fs_editor)
+        with pkg_meta_io_factory.package_meta_writer(file_path=new_package_info.toml_path) as pkg_meta_writer:
+            pkg_meta_writer.update_package_name(new_name=new_package_info.package_reg_name)
 
     def change_package_type(self, package_module_name: str, new_package_type: str) -> PackageInfo:
         old_package_info = self.package_index.get_package_info_from_module_name(package_module_name)