diff --git a/generate-runners/deploy.sh b/generate-runners/deploy.sh
index 45aaa3df..30ad4f32 100755
--- a/generate-runners/deploy.sh
+++ b/generate-runners/deploy.sh
@@ -63,6 +63,14 @@ if [[ -n "${OWNER}" && -n "${REPO}" ]]; then
     PREFIX=repos
 fi
 
+# make swap file if not exists. useful for adhoc cloud runners
+if [[ -z $(swapon --show=SIZE --raw --noheadings | sed 's/[^0-9]//g') ]]; then
+sudo fallocate -l $(free -h | awk 'NR==2{print(int(substr($2,1,length($2)-1)/2+.5))}')G /swapfile
+sudo chmod 600 /swapfile
+sudo mkswap /swapfile
+sudo swapon /swapfile
+fi
+
 # update OS and install dependencies
 sudo apt-get -q update
 [[ -z $(command -v xmllint) ]] && sudo apt-get -yy install libxml2-utils