diff --git a/NAMESPACE b/NAMESPACE
index da9e8a0..41446c0 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -130,6 +130,8 @@ importFrom(lazyeval,interp)
 importFrom(lazyeval,lazy_dots)
 importFrom(lazyeval,lazy_eval)
 importFrom(lifecycle,deprecate_warn)
+importFrom(lifecycle,deprecated)
+importFrom(lifecycle,is_present)
 importFrom(lubridate,is.POSIXct)
 importFrom(magclass,"getNames<-")
 importFrom(magclass,"getSets<-")
diff --git a/R/read.gdx.R b/R/read.gdx.R
index b517546..b6828b6 100644
--- a/R/read.gdx.R
+++ b/R/read.gdx.R
@@ -9,18 +9,24 @@
 #' @param fields fields to read from variables and equations (any of `lo`,
 #'        `l`, `m`, and `up`); ignored for parameters
 #' @param colNames string vector of column names to override dimension names
-#' @param factors return non-numerical columns as factors (default) or character
-#'        vectors
-#' @param squeeze if TRUE, squeeze out any zero or EPS stored in the GDX
+#' @param factors Deprecated.  Do not use any more.
+#' @param squeeze if `TRUE`, squeeze out any zero or EPS stored in the GDX
 #'        container
 #' @return quitte data frame
 #' @author Michaja Pehl
 #'
+#' @importFrom lifecycle deprecated deprecate_warn is_present
 #' @importFrom tibble as_tibble
 #'
 #' @export
 read.gdx <- function(gdxName, requestList.name, fields = "l", colNames = NULL,
-                     factors = TRUE, squeeze = TRUE) {
+                     factors = deprecated(), squeeze = TRUE) {
+
+    if (is_present(factors))
+    {
+        deprecate_warn('0.3135.0', 'quitte::read.gdx(factors = )',
+                       details = 'Please do not use the argument anymore.')
+    }
 
     # Check if gdxrrw package is installed
     if (!any(.packages(all.available = TRUE) == "gdxrrw"))