diff --git a/docs/conf.py b/docs/conf.py
index bc32a9d7..67b6599e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -345,10 +345,13 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "python": ("http://python.readthedocs.org/en/latest/", None),
-    "google-auth": ("https://google-auth.readthedocs.io/en/stable", None),
+    "python": ("https://python.readthedocs.org/en/latest/", None),
+    "google-auth": (
+        "https://googleapis.dev/python/google-auth/latest/index.html",
+        None,
+    ),
     "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None,),
-    "grpc": ("https://grpc.io/grpc/python/", None),
+    "grpc": ("https://grpc.github.io/grpc/python/", None),
     "proto-plus": ("https://proto-plus-python.readthedocs.io/en/latest/", None),
 }
 
diff --git a/synth.metadata b/synth.metadata
index 8c8cb6d2..4cd79d6a 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "6542bd723403513626f61642fc02ddca528409aa"
+        "sha": "9a7d9fbb7045c34c9d3d22c1ff766eeae51f04c9"
       }
     }
   ],