diff --git a/scripts/install b/scripts/install
index 1751443..77d3fb8 100755
--- a/scripts/install
+++ b/scripts/install
@@ -150,6 +150,10 @@ pushd "$final_path"
 	php$phpversion artisan optimize --no-interaction --verbose
 	php$phpversion artisan view:clear
 	php$phpversion artisan cache:clear
+
+	# install snappdf, since it isn't included by default anymore since
+	# 5.5.12: https://invoiceninja.github.io/docs/self-host-troubleshooting/#pdf-conversion-issues
+	php$phpversion vendor/bin/snappdf download
 popd
 
 chmod 750 "$final_path"
diff --git a/scripts/upgrade b/scripts/upgrade
index 0d98727..8e277d0 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -152,6 +152,10 @@ pushd "$final_path"
 	# clear cached stuff under /app/data/storage/framework (https://github.com/laravel/framework/issues/17377)
 	php$phpversion artisan view:clear
 	php$phpversion artisan cache:clear
+
+	# install snappdf, since it isn't included by default anymore since
+	# 5.5.12: https://invoiceninja.github.io/docs/self-host-troubleshooting/#pdf-conversion-issues
+	php$phpversion vendor/bin/snappdf download
 popd
 
 chmod 750 "$final_path"