diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 489d1e310dae2dd00fd68cb227aaa56c80fc873d..197153c3e6ea2353a27f03875c35f737929d67f4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,7 +20,7 @@ update_packages:
   script:
     - mkdir -p R_LIBS
     - Rscript -e 'if(!dir.exists("R_LIBS/remotes")) install.packages("remotes", lib = "R_LIBS")'
-    - apt-get update && apt-get install libxml2-dev
+    - apt-get update && apt-get -y install libxml2-dev
     - Rscript -e 'remotes::update_packages(c("dplyr", "rmarkdown", "readr", "lubridate", "zoo", "roxygen2"), lib = "R_LIBS")'
     - Rscript -e 'remotes::install_gitlab("HYCAR-Hydro/airgr@sd", host = "gitlab.irstea.fr", lib = "R_LIBS")'