diff --git a/docs/changes/newsfragments/215.bugfix b/docs/changes/newsfragments/215.bugfix
new file mode 100644
index 000000000..93d56dcf2
--- /dev/null
+++ b/docs/changes/newsfragments/215.bugfix
@@ -0,0 +1 @@
+Fix the output of :class:`junifer.markers.RSSETSMarker` to be 2D by `Synchon Mandal`_
\ No newline at end of file
diff --git a/junifer/markers/ets_rss.py b/junifer/markers/ets_rss.py
index c57f49eda..bb4eeef5d 100644
--- a/junifer/markers/ets_rss.py
+++ b/junifer/markers/ets_rss.py
@@ -133,6 +133,8 @@ class RSSETSMarker(BaseMarker):
         edge_ts, _ = _ets(out["data"])
         # Compute the RSS
         out["data"] = np.sum(edge_ts**2, 1) ** 0.5
+        # Make it 2D
+        out["data"] = out["data"][:, np.newaxis]
         # Set correct column label
         out["col_names"] = ["root_sum_of_squares_ets"]
         return out