diff --git a/Dockerfile b/Dockerfile
index a747572..677f27b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM rockylinux:8.6
+FROM rockylinux:9
 LABEL maintainer=StackHPC
 
-ENV SQUID_VERSION=4.15 \
+ENV SQUID_VERSION=5.5 \
     SQUID_CACHE_DIR=/var/spool/squid \
     SQUID_LOG_DIR=/var/log/squid \
     SQUID_USER=squid