diff --git a/data_safe_haven/utility/__init__.py b/data_safe_haven/utility/__init__.py
index 2b786f36fb..8a6ec3bcf5 100644
--- a/data_safe_haven/utility/__init__.py
+++ b/data_safe_haven/utility/__init__.py
@@ -1,12 +1,11 @@
 from .enums import SoftwarePackageCategory
 from .file_reader import FileReader
 from .logger import Logger
-from .types import PathType, YamlType
+from .types import PathType
 
 __all__ = [
     "FileReader",
     "Logger",
     "PathType",
     "SoftwarePackageCategory",
-    "YamlType",
 ]
diff --git a/data_safe_haven/utility/types.py b/data_safe_haven/utility/types.py
index 4a9d903d06..527e4e2ea3 100644
--- a/data_safe_haven/utility/types.py
+++ b/data_safe_haven/utility/types.py
@@ -1,5 +1,3 @@
 from pathlib import Path
-from typing import Any
 
 PathType = str | Path
-YamlType = dict[str, dict[str, Any]]