diff --git a/DESCRIPTION b/DESCRIPTION
index f1664937663c7bea50788f36d40db00c0a43dadb..fbe517cc9c7617f22fb90466c006b3c52898131d 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGRteaching
 Type: Package
 Title: Teaching Hydrological Modelling with the GR Rainfall-Runoff Models ('Shiny' Interface Included)
-Version: 0.2.10.13
+Version: 0.2.10.14
 Date: 2020-04-14
 Authors@R: c(
   person("Olivier", "Delaigue", role = c("aut", "cre"), comment = c(ORCID = "0000-0002-7668-8468"), email = "airGR@inrae.fr"),
diff --git a/NEWS.md b/NEWS.md
index 2a5a9601a9a8f35a56c2caf80ca04412345377f1..1223e049d69d89667e6647ca6e75a892296ff84b 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,7 +4,7 @@
 
 
 
-### 0.2.10.13 Release Notes (2020-04-14)
+### 0.2.10.14 Release Notes (2020-04-14)
 
 
 #### New features
diff --git a/inst/ShinyGR/ui.R b/inst/ShinyGR/ui.R
index 089fc03bd81fd31085401843b5e44da634db6362..a6d3098808e5ebafd4bea7aade8bb8d9801cda23 100644
--- a/inst/ShinyGR/ui.R
+++ b/inst/ShinyGR/ui.R
@@ -66,10 +66,10 @@ navbarPage(title       = div("airGRteaching",
                                                conditionalPanel(condition = "input.HydroModel == 'GR2M'",
                                                                 sliderInput("X2GR2M", label = "X2  (groundwater exchange coeff.)",
                                                                             post = "  [-]",
-                                                                            min = -5, 
-                                                                            max = +5, 
+                                                                            min = +0.05, 
+                                                                            max = +4, 
                                                                             step = 0.05,
-                                                                            value = 0)),
+                                                                            value = 2)),
                                                conditionalPanel(condition = "input.HydroModel != 'GR2M'",
                                                                 sliderInput("X2", label = "X2  (intercatchment exchange coeff.)",
                                                                             post = "  [mm/d]",