diff --git a/config/traefik/docker-entrypoint-override.sh b/config/traefik/docker-entrypoint-override.sh
index 6b2e49e..17044a1 100644
--- a/config/traefik/docker-entrypoint-override.sh
+++ b/config/traefik/docker-entrypoint-override.sh
@@ -23,6 +23,10 @@ add_arg "--entryPoints.https.address=:${TRAEFIK_PORT_HTTPS:-443}"
 add_arg "--entryPoints.https.transport.respondingTimeouts.readTimeout=12h"
 add_arg "--entryPoints.https.transport.respondingTimeouts.writeTimeout=12h"
 add_arg "--entryPoints.https.transport.respondingTimeouts.idleTimeout=3m"
+# allow encoded characters required for WOPI/Collabora
+add_arg "--entryPoints.https.http.encodedCharacters.allowEncodedSlash=true"
+add_arg "--entryPoints.https.http.encodedCharacters.allowEncodedQuestionMark=true"
+add_arg "--entryPoints.https.http.encodedCharacters.allowEncodedPercent=true"
 # docker provider (get configuration from container labels)
 add_arg "--providers.docker.endpoint=unix:///var/run/docker.sock"
 add_arg "--providers.docker.exposedByDefault=false"
diff --git a/traefik/opencloud.yml b/traefik/opencloud.yml
index 2f39ae0..fc5a571 100644
--- a/traefik/opencloud.yml
+++ b/traefik/opencloud.yml
@@ -9,7 +9,7 @@ services:
       - "traefik.http.services.opencloud.loadbalancer.server.port=9200"
       - "traefik.http.routers.opencloud.${TRAEFIK_SERVICES_TLS_CONFIG}"
   traefik:
-    image: traefik:v3
+    image: traefik:v3.6.4
     # release notes: https://github.com/traefik/traefik/releases
     user: ${TRAEFIK_CONTAINER_UID_GID:-0:0}
     networks: