diff --git a/scripts/install b/scripts/install
index a4edbe7..d8edba2 100644
--- a/scripts/install
+++ b/scripts/install
@@ -96,6 +96,7 @@ else
 fi
 
 # Install Yarn
+curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - 2>&1
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index adc0f06..a99906d 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -113,6 +113,7 @@ else
 fi
 
 # Install Yarn
+curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - 2>&1
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index f4521d6..267e29f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -177,6 +177,7 @@ else
 fi
 
 # Install Yarn
+curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - 2>&1
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 # Remove hook