diff --git a/2.1_first_module.ipynb b/2.1_first_module.ipynb
index e5e6c33..e1d1577 100644
--- a/2.1_first_module.ipynb
+++ b/2.1_first_module.ipynb
@@ -51,13 +51,7 @@
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": [
-    "import chisel3._\n",
-    "import chisel3.util._\n",
-    "import chisel3.tester._\n",
-    "import chisel3.tester.RawTester.test\n",
-    "import dotvisualizer._"
-   ]
+   "source": "import chisel3._\nimport chisel3.util._\nimport chisel3.tester._\nimport chisel3.tester.RawTester.test"
   },
   {
    "cell_type": "markdown",
@@ -382,4 +376,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 2
-}
+}
\ No newline at end of file