diff --git a/libervia/backend/tools/config.py b/libervia/backend/tools/config.py
index 6883c1f2..7e4a7247 100644
--- a/libervia/backend/tools/config.py
+++ b/libervia/backend/tools/config.py
@@ -357,8 +357,9 @@ class CommonSettings(ConfigOptions):
         default_factory=list, description="List of admin email addresses"
     )
     mutli_users: bool = Field(default=False, description="Enable multi-user support")
+    # FIXME: cache is temporarily disabled by default (it's broken)
     pubsub_cache_strategy: Literal["no_cache"] | None = Field(
-        default=None, description="PubSub cache strategy"
+        default="no_cache", description="PubSub cache strategy"
     )
     hosts: dict[str, dict | str] = Field(
         default_factory=dict,