diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11798ee45..de0df3a32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Typos "success" when returning status from API and "occurred" when logging to console.
 
 ### Added
+- Adding mime type for geojson
 - Add "when" parameter in a few GET API endpoints to enable pagination [#266](https://github.com/clowder-framework/clowder/issues/266)
 
 ## 1.18.1 - 2021-08-16
diff --git a/conf/mimetypes.conf b/conf/mimetypes.conf
index fe8c7c22a..9326af494 100644
--- a/conf/mimetypes.conf
+++ b/conf/mimetypes.conf
@@ -38,6 +38,7 @@ mimetype.presentation=video/presentation
 mimetype.PRESENTATION=video/presentation
 mimetype.iframe=text/iframe
 mimetype.IFRAME=text/iframe
+mimetype.geojson=application/geojson
 
 # Raw image formats
 mimetype.3fr=image/raw