diff --git a/pyproject.toml b/pyproject.toml
index 8690347..8eaefb9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pyotr"
-version = "0.6.0"
+version = "0.7.0"
 description = "Python OpenAPI-to-REST (and back) framework "
 authors = ["Berislav Lopac <berislav@lopac.net>"]
 license = "MIT"
diff --git a/src/pyotr/validation/responses/starlette.py b/src/pyotr/validation/responses/starlette.py
index 2136a5c..ab4b742 100644
--- a/src/pyotr/validation/responses/starlette.py
+++ b/src/pyotr/validation/responses/starlette.py
@@ -8,8 +8,9 @@ class StarletteOpenAPIResponseFactory:
     @classmethod
     def create(cls, response):
         """Create Starlette response."""
+        mimetype, *_ = response.headers.get("content-type", "").split(";")
         return OpenAPIResponse(
             data=response.body,
             status_code=response.status_code,
-            mimetype=response.headers.get("content-type"),
+            mimetype=mimetype,
         )