diff --git a/slim/Dockerfile b/slim/Dockerfile
index b4bc3e2..cc53668 100644
--- a/slim/Dockerfile
+++ b/slim/Dockerfile
@@ -10,7 +10,7 @@ ENV GPG_KEY D5823CACB477191CAC0075555AE420CC0209989E
 ARG CONFIGUREFLAGS="--prefix=/opt/znc --enable-cyrus --enable-perl --enable-python --disable-ipv6"
 ARG MAKEFLAGS=""
 
-ENV ZNC_VERSION 1.6.5
+ENV ZNC_VERSION 1.6.6
 
 RUN set -x \
     && adduser -S znc \