diff --git a/etherpad.yml b/etherpad.yml
index d5e3483..0f418f2 100644
--- a/etherpad.yml
+++ b/etherpad.yml
@@ -1,4 +1,4 @@
-version: '3'
+version: '3.5'
 
 services:
     # Etherpad: real-time collaborative document editing
diff --git a/jigasi.yml b/jigasi.yml
index 3ca4c84..4bef2a1 100644
--- a/jigasi.yml
+++ b/jigasi.yml
@@ -1,4 +1,4 @@
-version: '3'
+version: '3.5'
 
 services:
     # SIP gateway (audio)