diff --git a/config/environments/development.rb b/config/environments/development.rb
index 6aacdb20..593fbd3c 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -16,7 +16,7 @@ Metamaps::Application.configure do
   # S3 file storage
   config.paperclip_defaults = {
     storage: :s3,
-    :s3_credentials: {
+    s3_credentials: {
       bucket: ENV['S3_BUCKET_NAME'],
       access_key_id: ENV['AWS_ACCESS_KEY_ID'],
       secret_access_key: ENV['AWS_SECRET_ACCESS_KEY']