diff --git a/automated/dockerfiles/lts-22.28/Dockerfile b/automated/dockerfiles/lts-22.28/Dockerfile
index 4bd9826ec..a67f12693 100644
--- a/automated/dockerfiles/lts-22.28/Dockerfile
+++ b/automated/dockerfiles/lts-22.28/Dockerfile
@@ -5,7 +5,7 @@ LABEL maintainer="manny@fpcomplete.com"
 ARG GHC_VERSION=9.6.6
 ARG LTS_SLUG=lts-22.28
 ARG PID1_VERSION=0.1.2.0
-ARG STACK_VERSION=2.13.1
+ARG STACK_VERSION=2.15.5
 ARG CUDA_VERSION=10.0
 ARG JVM_PATH=/usr/lib/jvm/java-8-openjdk-amd64
 ARG LLVM_PATH=/usr/lib/llvm-9