diff --git a/scripts/installer.sh b/scripts/installer.sh
index d51d61fe2..9ad26f8e7 100755
--- a/scripts/installer.sh
+++ b/scripts/installer.sh
@@ -407,7 +407,8 @@ main() {
 			fi
 			export DEBIAN_FRONTEND=noninteractive
 			if ! type gpg >/dev/null; then
-				apt-get install -y gnupg
+				$SUDO apt-get update
+				$SUDO apt-get install -y gnupg
 			fi
 
 			set -x