diff --git a/tool_use/01_tool_use_overview.ipynb b/tool_use/01_tool_use_overview.ipynb
index e187d38..e553d21 100644
--- a/tool_use/01_tool_use_overview.ipynb
+++ b/tool_use/01_tool_use_overview.ipynb
@@ -201,8 +201,8 @@
    "outputs": [],
    "source": [
     "{\n",
-    "  \"symbol”: “GM”, \n",
-    "  \"price”: 43.09\n",
+    "  \"symbol\": \"GM\", \n",
+    "  \"price\": 43.09\n",
     "}"
    ]
   },
@@ -303,8 +303,8 @@
    "outputs": [],
    "source": [
     "{\n",
-    "  \"symbol”: “GM”, \n",
-    "  \"price”: 43.09\n",
+    "  \"symbol\": \"GM\", \n",
+    "  \"price\": 43.09\n",
     "}"
    ]
   },