diff --git a/02_production.ipynb b/02_production.ipynb
index 2a76e85..0a9b1ec 100644
--- a/02_production.ipynb
+++ b/02_production.ipynb
@@ -304,7 +304,7 @@
    "metadata": {},
    "source": [
     "# clean\n",
-    "To download images with Bing Image Search, sign up at Microsoft for a free account. You will be given a key, which you can copy and enter in a cell as follows (replacing 'XXX' with your key and executing it):"
+    "To download images with Bing Image Search, sign up at [Microsoft Azure](https://azure.microsoft.com/en-us/services/cognitive-services/bing-web-search-api/) for a free account. You will be given a key, which you can copy and enter in a cell as follows (replacing 'XXX' with your key and executing it):"
    ]
   },
   {
@@ -2001,4 +2001,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}
\ No newline at end of file
diff --git a/clean/02_production.ipynb b/clean/02_production.ipynb
index 03c0197..c413cc5 100644
--- a/clean/02_production.ipynb
+++ b/clean/02_production.ipynb
@@ -112,7 +112,7 @@
    "metadata": {},
    "source": [
     "# clean\n",
-    "To download images with Bing Image Search, sign up at Microsoft for a free account. You will be given a key, which you can copy and enter in a cell as follows (replacing 'XXX' with your key and executing it):"
+    "To download images with Bing Image Search, sign up at [Microsoft Azure](https://azure.microsoft.com/en-us/services/cognitive-services/bing-web-search-api/) for a free account. You will be given a key, which you can copy and enter in a cell as follows (replacing 'XXX' with your key and executing it):"
    ]
   },
   {
@@ -700,4 +700,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}
\ No newline at end of file