diff --git a/resources/parser/data_sets/osm.yaml b/resources/parser/data_sets/osm.yaml
index ab20a153..794a9a8f 100644
--- a/resources/parser/data_sets/osm.yaml
+++ b/resources/parser/data_sets/osm.yaml
@@ -1,6 +1,15 @@
 languages:
     pick_namespaced_language_probability: 0.6
 
+categories:
+    plural_probability: 0.6
+
+chains:
+    sample_probability: 0.5
+
+places:
+    drop_postcode_probability: 0.6
+
 streets:
     abbreviate_probability: 0.3
     separate_probability: 0.2