diff --git a/python/requirements/dbr91.txt b/python/requirements/dbr91.txt
deleted file mode 100644
index faf44bb8..00000000
--- a/python/requirements/dbr91.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-delta-spark==1.0.0
-ipython==7.22.0
-numpy==1.19.2
-pandas==1.2.4
-pyarrow==4.0.0
-pyspark==3.1.2
-scipy==1.6.2
\ No newline at end of file
diff --git a/python/tox.ini b/python/tox.ini
index 971b7035..dfbbdab2 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -23,7 +23,6 @@ basepython =
     dbr122: py39
     dbr113: py39
     dbr104: py38
-    dbr91: py38
 deps =
     -rrequirements/{envname}.txt
     -rrequirements/dev.txt