diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 60c0b0b85a..e9c4675920 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ defaults:
 env:
   JAVA_VERSION: 21 # must be consistent with POM; see also dependabot config for any version limits
   JAVA_VERSION_LATEST: 25 # the latest `JAVA_VERSION` that we test with CI
-  java_distribution: zulu
+  java_distribution: temurin
   groovy_version: 4.x
   CCDB_CONNECTION: 'sqlite:///${{ github.workspace }}/coatjava/etc/data/sqlite/ccdb.sqlite'
   RCDB_CONNECTION: 'sqlite:///${{ github.workspace }}/coatjava/etc/data/sqlite/rcdb.sqlite'
diff --git a/bin/install-clara b/bin/install-clara
index 25dc829c45..3c89e2dfa4 100755
--- a/bin/install-clara
+++ b/bin/install-clara
@@ -3,7 +3,7 @@
 set -e
 
 # Default versions:
-grapes=2.24
+grapes=2.26
 clara=5.0.2
 
 function error() {