diff --git a/gseapy/gsea.py b/gseapy/gsea.py
index 1e450a7..3610d55 100644
--- a/gseapy/gsea.py
+++ b/gseapy/gsea.py
@@ -410,6 +410,10 @@ def run(self):
         self._heatmat(df=dat.iloc[gsum.indices[0]], classes=self.groups)
         # write output and plotting
         self.to_df(gsum.summaries, gmt, self.ranking)
+        if self._outdir is not None:
+            self.ranking.to_csv(
+                os.path.join(self.outdir, "gsea_data.rnk"), sep="\t", header=False
+            )
         self._logger.info("Congratulations. GSEApy ran successfully.................\n")
 
         return
@@ -582,8 +586,8 @@ def run(self):
             indices=gsum.indices if isinstance(dat2, pd.DataFrame) else None,
         )
         if self._outdir is not None:
-            self._logger.info(
-                "Start to generate gseapy reports, and produce figures..."
+            self.ranking.to_csv(
+                os.path.join(self.outdir, "prerank_data.rnk"), sep="\t", header=False
             )
 
         self._logger.info("Congratulations. GSEApy runs successfully................\n")