diff --git a/09_tabular.ipynb b/09_tabular.ipynb
index e3ed14c..b767040 100644
--- a/09_tabular.ipynb
+++ b/09_tabular.ipynb
@@ -7,7 +7,7 @@
    "outputs": [],
    "source": [
     "#hide\n",
-    "! [ -e /content ] && pip install -Uqq fastbook kaggle waterfallcharts treeinterpreter dtreeviz\n",
+    "! [ -e /content ] && pip install -Uqq fastbook kaggle waterfallcharts treeinterpreter dtreeviz==1.4.1\n",
     "import fastbook\n",
     "fastbook.setup_book()"
    ]
diff --git a/clean/09_tabular.ipynb b/clean/09_tabular.ipynb
index 57ef84d..0daf9b8 100644
--- a/clean/09_tabular.ipynb
+++ b/clean/09_tabular.ipynb
@@ -7,7 +7,7 @@
    "outputs": [],
    "source": [
     "#hide\n",
-    "! [ -e /content ] && pip install -Uqq fastbook kaggle waterfallcharts treeinterpreter dtreeviz\n",
+    "! [ -e /content ] && pip install -Uqq fastbook kaggle waterfallcharts treeinterpreter dtreeviz==1.4.1\n",
     "import fastbook\n",
     "fastbook.setup_book()"
    ]