diff --git a/Dockerfile b/Dockerfile
index d03d0be..2ba0e7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM arm32v6/alpine:3.7 as build
 
-ENV SQUID_VER 3.5.27
+ENV SQUID_VER 3.5.28
 ENV SQUID_SIG_KEY EA31CC5E9488E5168D2DCC5EB268E706FF5CF463
 
 RUN set -x && \