diff --git a/DESCRIPTION b/DESCRIPTION
index cf417719d8fb14f5d03bf55239ba8e09750246b3..f5abe9b20009f94e6e8608815c1f8aa7fae8da3e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -7,7 +7,7 @@ Authors@R: c(
   person("Olivier", "Delaigue", role = c("aut", "cre"), comment = c(ORCID = "0000-0002-7668-8468"), email = "airGR@inrae.fr"),
   person("Laurent", "Coron", role = c("aut"), comment = c(ORCID = "0000-0002-1503-6204")),
   person("Pierre", "Brigode", role = c("aut"), comment = c(ORCID = "0000-0001-8257-0741")),
-  person("Guillaume", "Thirel", role = c("ctb"), comment = c(ORCID = "0000-0002-1444-1830"))
+  person("Guillaume", "Thirel", role = c("aut"), comment = c(ORCID = "0000-0002-1444-1830"))
   )
 Depends:
   R (>= 3.6.0),
diff --git a/man/CalGR.Rd b/man/CalGR.Rd
index d3470d9708c41390677f05b8ab4867065c060ad9..d511b14d766b1e441d8313b23a1474b456447997 100644
--- a/man/CalGR.Rd
+++ b/man/CalGR.Rd
@@ -59,7 +59,7 @@ functions
 }
 
 
-\author{Olivier Delaigue}
+\author{Olivier Delaigue, Guillaume Thirel}
 
 
 \examples{
diff --git a/man/SimGR.Rd b/man/SimGR.Rd
index e19ec637a3b7122824676777e10687b5c922566e..c4a40a6516fc042606226c89d31a03295de6251d 100644
--- a/man/SimGR.Rd
+++ b/man/SimGR.Rd
@@ -68,7 +68,7 @@ The user can also use the parameters resulting from a calibration. In this case,
 }
 
 
-\author{Olivier Delaigue}
+\author{Olivier Delaigue, Guillaume Thirel}
 
 
 \examples{