diff --git a/steps/install.sh b/steps/install.sh
index 404c958b..bf7742bc 100755
--- a/steps/install.sh
+++ b/steps/install.sh
@@ -86,7 +86,7 @@ function install_package() {
     local PACKAGE=$1
     if ! eval "$PACKAGE" --version >/dev/null 2>&1; then
         if "${LOCAL}/help/is-linux.sh"; then
-            "${LOCAL}/help/sudo.sh" apt-get install -y "$PACKAGE"
+            "${LOCAL}/help/sudo.sh" apt-get install --yes "$PACKAGE"
         elif "${LOCAL}/help/is-macos.sh"; then
             if brew -v; then
                 "${LOCAL}/help/sudo.sh" --as-user brew install "$PACKAGE"
@@ -117,7 +117,7 @@ fi
 
 if ! pdftotext -v >/dev/null 2>&1; then
   if "${LOCAL}/help/is-linux.sh"; then
-    "${LOCAL}/help/sudo.sh" apt-get install -y xpdf
+    "${LOCAL}/help/sudo.sh" apt-get install --yes xpdf
   elif "${LOCAL}/help/is-macos.sh"; then
     "${LOCAL}/help/sudo.sh" --as-user brew install poppler
   else