diff --git a/Dockerfile b/Dockerfile
index c424053..63b5daa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/powershell:7.3-alpine-3.17
+FROM mcr.microsoft.com/powershell:7.5-alpine-3.20@sha256:a6beeddb2fcf45547c9099fba091ce231e51aa374fe62ecc182f7c28b69a6cbf
 
 # install packages required to run the tests
 RUN apk add --no-cache jq coreutils