diff --git a/Data-Buckets.md b/Data-Buckets.md
index 5d0fbdc..1c4d14c 100644
--- a/Data-Buckets.md
+++ b/Data-Buckets.md
@@ -14,7 +14,7 @@
 
 ```
 get_data(std::string bucket_key)
-set_data(std::string bucket_key, std::string bucket_value, uint32 expires_at_unix = 0)
+set_data(std::string bucket_key, std::string bucket_value, std::string expires_in)
 delete_data(std::string bucket_key)
 ```