diff --git a/litestar/openapi/spec/enums.py b/litestar/openapi/spec/enums.py
index 3b7bb96093..da9adeabd1 100644
--- a/litestar/openapi/spec/enums.py
+++ b/litestar/openapi/spec/enums.py
@@ -26,6 +26,7 @@ class OpenAPIFormat(str, Enum):
     IRI_REFERENCE = "iri-reference"  # noqa: PIE796
     UUID = "uuid"
     REGEX = "regex"
+    BINARY = "binary"
 
 
 class OpenAPIType(str, Enum):