diff --git a/docs/_content/data-source/tutorial-setup.md b/docs/_content/data-source/tutorial-setup.md
index 11a5474..f619d17 100644
--- a/docs/_content/data-source/tutorial-setup.md
+++ b/docs/_content/data-source/tutorial-setup.md
@@ -71,7 +71,7 @@ Open `src/index.js` and update the context:
   
   /*
    * For more information on the main data source object, see
-   * https://ibm.biz/graphql-data-source-main
+   * https://gramps.js.org/api/gramps/#gramps
    */
   export default {
 -   // TODO: Rename the context to describe the data source.
diff --git a/docs/_content/errors/formatError.md b/docs/_content/errors/formatError.md
index b48290d..5d14afa 100644
--- a/docs/_content/errors/formatError.md
+++ b/docs/_content/errors/formatError.md
@@ -51,7 +51,7 @@ Description: Could not load the given xkcd comic
 Error Code: XKCDModel_Error
 GraphQL Model: XKCDModel
 Target Endpoint: https://xkcd.com/2000/info.0.json
-Documentation: https://ibm.biz/gramps-data-source-tutorial
+Documentation: https://xkcd.com/json.html
 Data: {
     "id": "2000"
 }
diff --git a/src/lib/externalDataSources.js b/src/lib/externalDataSources.js
index 17a0700..89d31c5 100644
--- a/src/lib/externalDataSources.js
+++ b/src/lib/externalDataSources.js
@@ -59,7 +59,8 @@ const warnInProduction = ({ sources, logger }) => {
       '',
       `     External source(s): ${externalSources.join(', ')}`,
       '',
-      '     See https://ibm.biz/gramps-data-source-tutorial for details.',
+      '     For details, see:',
+      '       https://gramps.js.org/data-source/data-source-overview/',
       '======================================================================',
     ].join(EOL);
 
@@ -92,7 +93,7 @@ const warnForOverrides = ({ overrides, logger }) => {
 
   const message = [
     EOL,
-    `========================= WARNING ==========================`,
+    `============================ WARNING =============================`,
     `     Existing data sources have been overridden by`,
     `     development-only data sources. This WILL NOT work`,
     `     in production environments.`,
@@ -100,8 +101,9 @@ const warnForOverrides = ({ overrides, logger }) => {
     `     These data sources are running in dev-only mode:`,
     `     - ${overrides.join(`${EOL}     - `)}`,
     ``,
-    `     Details: https://ibm.biz/graphql-data-source`,
-    `============================================================`,
+    `     Details: `,
+    `     https://gramps.js.org/data-source/data-source-overview/`,
+    `==================================================================`,
     EOL,
   ];