diff --git a/Dockerfile b/Dockerfile
index 0acf1e5..e61d3ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG PLEX_SHA=aee7341f784812137f0b50a3cc00b418514fb6e4
 ARG BUSYBOX_VER=1.34.1
 ARG SU_EXEC_VER=0.4
 ARG TINI_VER=0.19.0
-ARG ZLIB_VER=1.2.11
+ARG ZLIB_VER=1.2.12
 ARG LIBXML2_VER=v2.9.10
 ARG LIBXSLT_VER=v1.1.34
 ARG XMLSTAR_VER=1.6.1