diff --git a/DESCRIPTION b/DESCRIPTION
index c1331d22e238fb22d22bfa030626e71a5e1d9070..adf79cf2146046a07ef67c0d8ca2c1e54a952b86 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.2.9.20
+Version: 1.2.9.21
 Date: 2019-03-18
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NEWS.rmd b/NEWS.rmd
index e23f556fa19dbdcd2360f85cb3f0504b31df35d1..01fc60da6393b4d503545415ace4a8f4db7b5e37 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -13,7 +13,7 @@ output:
 
 
 
-### 1.2.9.20 Release Notes (2019-03-18) 
+### 1.2.9.21 Release Notes (2019-03-18) 
 
 
 
diff --git a/man/RunModel_CemaNeigeGR4J.Rd b/man/RunModel_CemaNeigeGR4J.Rd
index 1ea7f646fa5257ef8790c64f1e3c04054b6309b1..2904555657664e5624c4a53add1f19698817d93c 100644
--- a/man/RunModel_CemaNeigeGR4J.Rd
+++ b/man/RunModel_CemaNeigeGR4J.Rd
@@ -30,7 +30,7 @@ CemaNeige X3 \tab (optional) accumulation threshold [mm] (needed if \code{IsHyst
 CemaNeige X4 \tab (optional) percentage (between 0 and 1) of annual snowfall defining the melt threshold [-] (needed if \code{IsHyst = TRUE}) \cr
 }}
 
-\item{IsHyst}{}
+\item{IsHyst}{[boolean] boolean indicating if the hysteresis version of CemaNeige is used. See details}
 }
 
 
diff --git a/man/RunModel_CemaNeigeGR5J.Rd b/man/RunModel_CemaNeigeGR5J.Rd
index 9eabec57007d4f4777a4e1771434a012eddf14fe..c5fb85010081966b449f2e000af3d3148f594aff 100644
--- a/man/RunModel_CemaNeigeGR5J.Rd
+++ b/man/RunModel_CemaNeigeGR5J.Rd
@@ -30,7 +30,7 @@ CemaNeige X2 \tab degree-day melt coefficient [mm/°C/d]
 CemaNeige X3 \tab (optional) accumulation threshold [mm] (needed if \code{IsHyst = TRUE}) \cr
 CemaNeige X4 \tab (optional) percentage (between 0 and 1) of annual snowfall defining the melt threshold [-] (needed if \code{IsHyst = TRUE}) \cr
 }}
-\item{IsHyst}{}
+\item{IsHyst}{[boolean] boolean indicating if the hysteresis version of CemaNeige is used. See details}
 }
 
 
diff --git a/man/RunModel_CemaNeigeGR6J.Rd b/man/RunModel_CemaNeigeGR6J.Rd
index 76a315d09f9d67b4cdc82ff12f5b4732bc1cc7ba..d12514024a301463f805eb8683b81d87867e9e25 100644
--- a/man/RunModel_CemaNeigeGR6J.Rd
+++ b/man/RunModel_CemaNeigeGR6J.Rd
@@ -31,7 +31,7 @@ CemaNeige X2 \tab degree-day melt coefficient [mm/°C/d]
 CemaNeige X3 \tab (optional) accumulation threshold [mm] (needed if \code{IsHyst = TRUE}) \cr
 CemaNeige X4 \tab (optional) percentage (between 0 and 1) of annual snowfall defining the melt threshold [-] (needed if \code{IsHyst = TRUE})\cr
 }}
-\item{IsHyst}{}
+\item{IsHyst}{[boolean] boolean indicating if the hysteresis version of CemaNeige is used. See details}
 }