diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 655057fa..7dca12b2 100755
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,7 +1,15 @@
-# owners and reviewers
-configs             @Alexsandruss
-configs/spmd*       @Alexsandruss @ethanglaser
-sklbench            @Alexsandruss
-*.md                @Alexsandruss @samir-nasibli
-requirements*.txt   @Alexsandruss @ethanglaser
-conda-env-*.yml     @Alexsandruss @ethanglaser
+# benchmarking config files
+configs                    @Alexsandruss
+configs/spmd/*             @ethanglaser
+configs/regular/xgboost*   @razdoburdin
+# sklbench implementation and associated docs
+sklbench                   @Alexsandruss
+# all documentation files
+*.md                       @Alexsandruss
+# dependencies files
+requirements*.txt          @Alexsandruss @ethanglaser
+conda-env-*.yml            @Alexsandruss @ethanglaser
+# repository utilities
+/.*                        @Alexsandruss
+/*.yml                     @Alexsandruss
+/*.toml                    @Alexsandruss