diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8be3ae1f97..b8f308c377 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -26,7 +26,7 @@ jobs:
       fail-fast: false
       matrix:
         java_version: ['8', '11', '17', '21']
-        os: ['ubuntu-20.04']
+        os: ['ubuntu-latest']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
diff --git a/pom.xml b/pom.xml
index 7c15108414..1508348701 100644
--- a/pom.xml
+++ b/pom.xml
@@ -147,10 +147,11 @@
   <!-- Alas, need to include snapshot reference since otherwise can not find
        snapshot of parent... -->
   <repositories>
+    <!-- 13-May-2025, tatu: now access snapshots via Central Portal -->
     <repository>
-      <id>sonatype-nexus-snapshots</id>
-      <name>Sonatype Nexus Snapshots</name>
-      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+      <id>central-snapshots</id>
+      <name>Sonatype Central Portal (snapshots)</name>
+      <url>https://central.sonatype.com/repository/maven-snapshots</url>
       <releases><enabled>false</enabled></releases>
       <snapshots><enabled>true</enabled></snapshots>
     </repository>