diff --git a/docs/usage/private-modules.md b/docs/usage/private-modules.md
index 23fb2aa7639bc41e9f41256a985086e8beda8dcb..87159f65ba7acf442ecb3eeac384a060a86b7bf5 100644
--- a/docs/usage/private-modules.md
+++ b/docs/usage/private-modules.md
@@ -119,7 +119,7 @@ The following details the most common/popular manager artifacts updating and how
 
 ### bundler
 
-`hostRules` with `hostType=bundler` are converted into environment variables which Bundler supports.
+`hostRules` with `hostType=rubygems` are converted into environment variables which Bundler supports.
 
 ### composer
 
diff --git a/lib/manager/bundler/artifacts.ts b/lib/manager/bundler/artifacts.ts
index b855c78568809efc34c20bc2eac000a775e8085d..7d3fc830ff356f5d702ba35fd26d11d671abf8bd 100644
--- a/lib/manager/bundler/artifacts.ts
+++ b/lib/manager/bundler/artifacts.ts
@@ -125,7 +125,7 @@ export async function updateArtifacts(
     ];
 
     const bundlerHostRules = findAllAuthenticatable({
-      hostType: 'bundler',
+      hostType: 'rubygems',
     });
 
     const bundlerHostRulesVariables = bundlerHostRules.reduce(