diff --git a/jfjoch_viewer/files/config.yaml b/jfjoch_viewer/files/config.yaml
index 3b4d3a5..4a7c199 100644
--- a/jfjoch_viewer/files/config.yaml
+++ b/jfjoch_viewer/files/config.yaml
@@ -6,6 +6,9 @@ jfjoch_viewer:
     overlay: base
     relstage: stable
   versions:
+    1.0.0-rc.166:
+      config:
+        relstage: stable
     1.0.0-rc.164:
       config:
         relstage: stable
diff --git a/rugnux/files/config.yaml b/rugnux/files/config.yaml
index f439e14..df2557a 100644
--- a/rugnux/files/config.yaml
+++ b/rugnux/files/config.yaml
@@ -6,6 +6,9 @@ rugnux:
     overlay: base
     relstage: stable
   versions:
+    1.0.0-rc.166:
+      config:
+        relstage: stable
     1.0.0-rc.164:
       config:
         relstage: stable