diff --git a/alpine-glibc/Dockerfile b/alpine-glibc/Dockerfile
index 5f6f10e..80307fe 100644
--- a/alpine-glibc/Dockerfile
+++ b/alpine-glibc/Dockerfile
@@ -1,7 +1,7 @@
 # vim:set ft=dockerfile:
 #FROM frolvlad/alpine-glibc
 
-FROM andrius/asterisk:alpine-16.3.0
+FROM andrius/asterisk:alpine-glibc-13.17.2
 
 
 LABEL maintainer="Andrius Kairiukstis <k@andrius.mobi>"
@@ -11,6 +11,7 @@ RUN apk add --update --no-cache --quiet \
       asterisk-sample-config \
       asterisk-dahdi \
       asterisk-sounds-en \
+      asterisk-speex \
     >/dev/null \
 && asterisk -U asterisk &>/dev/null \
 && sleep 5s \
@@ -28,7 +29,7 @@ RUN apk add --update --no-cache --quiet \
            /tmp/* \
            /var/tmp/*
 
-EXPOSE 5060/udp 5060/tcp
+EXPOSE 5060/udp 5060/tcp 4569/udp
 VOLUME /var/lib/asterisk/sounds /var/lib/asterisk/keys /var/lib/asterisk/phoneprov /var/spool/asterisk /var/log/asterisk
 
 ADD docker-entrypoint.sh /docker-entrypoint.sh