diff --git a/docs/tutorials/01_chemistry_hamiltonian.ipynb b/docs/tutorials/01_chemistry_hamiltonian.ipynb
index 7c66e27..3db838b 100644
--- a/docs/tutorials/01_chemistry_hamiltonian.ipynb
+++ b/docs/tutorials/01_chemistry_hamiltonian.ipynb
@@ -501,8 +501,8 @@
     "axs[0].set_yticklabels(yt1)\n",
     "axs[0].axhline(y=n2_exact, color=\"red\", linestyle=\"--\", label=\"Exact\")\n",
     "axs[0].set_title(\"Approximated Ground State Energy vs SQD Iterations\")\n",
-    "axs[0].set_xlabel(\"Iteration Index\", fontdict={'fontsize': 12})\n",
-    "axs[0].set_ylabel(\"Energy (Ha)\", fontdict={'fontsize': 12})\n",
+    "axs[0].set_xlabel(\"Iteration Index\", fontdict={\"fontsize\": 12})\n",
+    "axs[0].set_ylabel(\"Energy (Ha)\", fontdict={\"fontsize\": 12})\n",
     "axs[0].legend()\n",
     "\n",
     "# Plot orbital occupancy\n",
@@ -510,8 +510,8 @@
     "axs[1].set_xticks(x2)\n",
     "axs[1].set_xticklabels(x2)\n",
     "axs[1].set_title(\"Avg Occupancy per Spatial Orbital\")\n",
-    "axs[1].set_xlabel(\"Orbital Index\", fontdict={'fontsize': 12})\n",
-    "axs[1].set_ylabel(\"Avg Occupancy\", fontdict={'fontsize': 12})\n",
+    "axs[1].set_xlabel(\"Orbital Index\", fontdict={\"fontsize\": 12})\n",
+    "axs[1].set_ylabel(\"Avg Occupancy\", fontdict={\"fontsize\": 12})\n",
     "\n",
     "plt.tight_layout()\n",
     "plt.show()"