diff --git a/lib/chroma/api_operations/request.rb b/lib/chroma/api_operations/request.rb
index 7d03e62..61e8e99 100644
--- a/lib/chroma/api_operations/request.rb
+++ b/lib/chroma/api_operations/request.rb
@@ -118,7 +118,7 @@ def execute_request(method, url, params = {}, options = {})
           request.content_type = "application/json"
           request.body = params.to_json if params.size > 0
           request.basic_auth(uri.user, uri.password) if !uri.user.nil?
-          request['X-Chroma-Token'] = ENV.fetch('CHROMA_SERVER_AUTHN_CREDENTIALS', nil) if ENV["CHROMA_SERVER_AUTHN_CREDENTIALS"]
+          request['X-Chroma-Token'] = ENV.fetch('CHROMA_SERVER_AUTHN_CREDENTIALS', nil) if ENV.fetch('CHROMA_SERVER_AUTHN_CREDENTIALS', nil)
           request
         end
       end