diff --git a/Containerfile b/Containerfile
index 56f51a2..d595212 100644
--- a/Containerfile
+++ b/Containerfile
@@ -14,7 +14,7 @@ RUN apk add --no-cache \
   poetry \
   git
 
-ENV VERSION=v1.125.0
+ENV VERSION=v1.127.1
 RUN git clone https://github.com/element-hq/synapse.git
 WORKDIR /synapse
 RUN git checkout $VERSION
@@ -33,6 +33,7 @@ RUN apk add --no-cache \
   python3 \
   py3-psycopg2 \
   py3-authlib \
+  py3-asn1 \
   libffi \
   openssl \
   zlib \