diff --git a/DESCRIPTION b/DESCRIPTION
index 5486f42c3d313ff663aa0aeb21d549c19f981cc8..baffe254f5b55312e4f82dc3946b3c607bf50acd 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.4.4.26
+Version: 1.4.4.27
 Date: 2020-04-30
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NAMESPACE b/NAMESPACE
index 97d7793f352bb713350c05d7cf4457cb224ab978..745c4db8708fa623943dd332a733461b18d19327 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -9,7 +9,7 @@ useDynLib(airGR, .registration = TRUE)
 ##            S3 methods           ##
 #####################################
 S3method("plot", "OutputsModel")
-
+S3method("SeriesAggreg2", "data.frame")
 
 
 
@@ -49,6 +49,9 @@ export(RunModel_GR6J)
 export(RunModel_Lag)
 export(SeriesAggreg)
 export(SeriesAggreg2)
+#export(SeriesAggreg2.data.frame)
+#export(SeriesAggreg2.InputsModel)
+#export(SeriesAggreg2.OutputsModel)
 export(TransfoParam)
 export(TransfoParam_CemaNeige)
 export(TransfoParam_CemaNeigeHyst)
diff --git a/NEWS.md b/NEWS.md
index 33a677327c3b33f199aaf8dd66f48ae649a9fc14..59b12c2a61d75c9b3aa73f940ffbe7da1655912e 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,10 +4,11 @@
 
 
 
-### 1.4.4.26 Release Notes (2020-04-30)
+### 1.4.4.27 Release Notes (2020-04-30)
 
 #### New features
 
+- Added <code>SeriesAggreg2()</code> method. 
 - Added <code>SeriesAggreg2()</code> function. This new verson of the <code>SeriesAggreg()</code> function  allows to compute regimes.
 
 
diff --git a/R/SeriesAggreg2.R b/R/SeriesAggreg2.R
index 4da98e9b21f3e7eca3835cafc6a3a39fbc5b92dd..80ea4610e0f5daf19143c1bb0a9354187e08a4e8 100644
--- a/R/SeriesAggreg2.R
+++ b/R/SeriesAggreg2.R
@@ -1,5 +1,14 @@
-SeriesAggreg2 <- function(TabSeries, Format, TimeFormat, NewTimeFormat, ConvertFun,
-                          YearFirstMonth = 1, TimeLag = 0, verbose = TRUE) {
+SeriesAggreg2 <- function(TabSeries,
+                          Format, TimeFormat, NewTimeFormat,
+                          YearFirstMonth = 1, TimeLag = 0,
+                          verbose = TRUE,
+                          ...) {
+  UseMethod("SeriesAggreg2")
+}
+
+
+SeriesAggreg2.data.frame <- function(TabSeries, Format, TimeFormat, NewTimeFormat,
+                                  YearFirstMonth = 1, TimeLag = 0, verbose = TRUE, ..., ConvertFun) {
   
   ## Arguments checks
   if (!missing(TimeFormat)) {