diff --git a/DESCRIPTION b/DESCRIPTION
index 0e841ee6aa3bfb0e14f340cc71f59491ba9c38cc..07e43cc9500a9f218263d52a29f24041f976f1e6 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.6.9.0
+Version: 1.6.9.1
 Date: 2021-01-08
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NAMESPACE b/NAMESPACE
index 5d211da10e84c0fd65df7e835c17e466ee96d4a7..bf71216c1b7e82680ccdaf969983b105c814200d 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -8,6 +8,8 @@ useDynLib(airGR, .registration = TRUE)
 #####################################
 ##            S3 methods           ##
 #####################################
+S3method('[', InputsModel)
+S3method('[', OutputsModel)
 S3method(plot, OutputsModel)
 S3method(SeriesAggreg, data.frame)
 S3method(SeriesAggreg, list)
diff --git a/NEWS.md b/NEWS.md
index 72be2a4375f61a5f2518db2e84965510ebab6772..f976a4bfb500e849037a050324029c1dc70f0b0b 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -2,7 +2,7 @@
 
 
 
-### 1.6.9.0 Release Notes (2021-01-08)
+### 1.6.9.1 Release Notes (2021-01-08)
 
 #### New features