diff --git a/DESCRIPTION b/DESCRIPTION
index b5792d9..c92c91e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -4,7 +4,8 @@ Version: 0.3.4
 Authors@R: 
     c(person("David", "Schoch", , "david@schochastics.net", role = c("aut", "cre"), comment = c(ORCID = "0000-0003-2952-4812")),
       person("Chung-hong", "Chan", ,"chainsawtiney@gmail.com", role = c("aut"), comment = c(ORCID = "0000-0002-6232-7530")),
-      person("Johannes", "Gruber", ,"JohannesB.Gruber@gmail.com", role = c("ctb"), comment = c(ORCID = "0000-0001-9177-1772")))
+      person("Johannes", "Gruber", ,"JohannesB.Gruber@gmail.com", role = c("ctb"), comment = c(ORCID = "0000-0001-9177-1772")),
+      person("Tim", "Schatto-Eckrodt", ,"kudusch@posteo.de", role = c("ctb"), comment = c(ORCID = "0000-0003-1658-4373")))
 Description: An implementation of calls designed to collect and organize Mastodon data via its Application Program Interfaces (API), which can be found at the following URL: <https://docs.joinmastodon.org/>.
 License: MIT + file LICENSE
 URL: https://gesistsa.github.io/rtoot/, https://github.com/gesistsa/rtoot/
diff --git a/R/utils.R b/R/utils.R
index 568c54f..575397a 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -237,15 +237,23 @@ rtoot_ask <- function(prompt = "enter authorization code: ", pass = TRUE, check_
     return(passFun(prompt = prompt))
 }
 
+handle_id <- function(x) {
+    ## Convert x to snowflake id if it is POSIXct
+    if (is(x, "POSIXct")) {
+        return(as.numeric(x) * (2^16) * 1000)
+    }
+    x
+}
+
 handle_params <- function(params, max_id, since_id, min_id) {
     if (!missing(max_id)) {
-        params$max_id <- max_id
+        params$max_id <- handle_id(max_id)
     }
     if (!missing(since_id)) {
-        params$since_id <- since_id
+        params$since_id <- handle_id(since_id)
     }
     if (!missing(min_id)) {
-        params$min_id <- min_id
+        params$min_id <- handle_id(min_id)
     }
     params
 }