diff --git a/etc/diskspace/clean-old-stack-libs.sh b/etc/diskspace/clean-old-stack-libs.sh
index ac768017..7e8e9035 100755
--- a/etc/diskspace/clean-old-stack-libs.sh
+++ b/etc/diskspace/clean-old-stack-libs.sh
@@ -10,4 +10,4 @@ fi
 cd ~/stackage/automated/work/$1/unpack-dir/.stack-work/install/x86_64-linux/*/*/lib/x86_64-linux-ghc-*
 pwd
 
-stack --resolver lts-18.6 script ~/stackage/etc/diskspace/remove-old-stack-work-libs.hs
+stack --resolver lts-19.33 script ~/stackage/etc/diskspace/remove-old-stack-work-libs.hs