diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 507912c50..cf1dd2b00 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.42.0"
+  ".": "1.42.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index de1f0f21d..bd28126ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.42.1](https://github.com/googleapis/google-auth-library-java/compare/v1.42.0...v1.42.1) (2026-01-23)
+
+
+### Bug Fixes
+
+* Mark GdchCredentialsTestUtil test util class as public ([#1877](https://github.com/googleapis/google-auth-library-java/issues/1877)) ([1868969](https://github.com/googleapis/google-auth-library-java/commit/1868969b2701fe0faa4511c36443666c3aaad534))
+
 ## [1.42.0](https://github.com/googleapis/google-auth-library-java/compare/v1.41.0...v1.42.0) (2026-01-23)
 
 
diff --git a/appengine/pom.xml b/appengine/pom.xml
index 7c8c1cafa..81e70e3fa 100644
--- a/appengine/pom.xml
+++ b/appengine/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.auth</groupId>
     <artifactId>google-auth-library-parent</artifactId>
-    <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-parent:current} -->
+    <version>1.42.1</version><!-- {x-version-update:google-auth-library-parent:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/bom/pom.xml b/bom/pom.xml
index eeeb22775..601beb428 100644
--- a/bom/pom.xml
+++ b/bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.auth</groupId>
   <artifactId>google-auth-library-bom</artifactId>
-  <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-bom:current} -->
+  <version>1.42.1</version><!-- {x-version-update:google-auth-library-bom:current} -->
   <packaging>pom</packaging>
   <name>Google Auth Library for Java BOM</name>
   <description>
diff --git a/cab-token-generator/pom.xml b/cab-token-generator/pom.xml
index 5a5a0219b..0e6ed124e 100644
--- a/cab-token-generator/pom.xml
+++ b/cab-token-generator/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.google.auth</groupId>
     <artifactId>google-auth-library-parent</artifactId>
-    <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-parent:current} -->
+    <version>1.42.1</version><!-- {x-version-update:google-auth-library-parent:current} -->
   </parent>
 
   <artifactId>google-auth-library-cab-token-generator</artifactId>
diff --git a/credentials/pom.xml b/credentials/pom.xml
index 3ba9a13f8..cabf53be3 100644
--- a/credentials/pom.xml
+++ b/credentials/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.auth</groupId>
     <artifactId>google-auth-library-parent</artifactId>
-    <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-parent:current} -->
+    <version>1.42.1</version><!-- {x-version-update:google-auth-library-parent:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/oauth2_http/pom.xml b/oauth2_http/pom.xml
index 0f306932c..930e3b084 100644
--- a/oauth2_http/pom.xml
+++ b/oauth2_http/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>com.google.auth</groupId>
     <artifactId>google-auth-library-parent</artifactId>
-    <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-parent:current} -->
+    <version>1.42.1</version><!-- {x-version-update:google-auth-library-parent:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/pom.xml b/pom.xml
index d51baf7f5..522be3749 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.auth</groupId>
   <artifactId>google-auth-library-parent</artifactId>
-  <version>1.42.1-SNAPSHOT</version><!-- {x-version-update:google-auth-library-parent:current} -->
+  <version>1.42.1</version><!-- {x-version-update:google-auth-library-parent:current} -->
   <packaging>pom</packaging>
   <name>Google Auth Library for Java</name>
   <description>Client libraries providing authentication and
diff --git a/versions.txt b/versions.txt
index 3e2f6cad9..6d21e7273 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,9 +1,9 @@
 # Format:
 # module:released-version:current-version
 
-google-auth-library:1.42.0:1.42.1-SNAPSHOT
-google-auth-library-bom:1.42.0:1.42.1-SNAPSHOT
-google-auth-library-parent:1.42.0:1.42.1-SNAPSHOT
-google-auth-library-appengine:1.42.0:1.42.1-SNAPSHOT
-google-auth-library-credentials:1.42.0:1.42.1-SNAPSHOT
-google-auth-library-oauth2-http:1.42.0:1.42.1-SNAPSHOT
+google-auth-library:1.42.1:1.42.1
+google-auth-library-bom:1.42.1:1.42.1
+google-auth-library-parent:1.42.1:1.42.1
+google-auth-library-appengine:1.42.1:1.42.1
+google-auth-library-credentials:1.42.1:1.42.1
+google-auth-library-oauth2-http:1.42.1:1.42.1