diff --git a/.github/workflows/ci-all.yaml b/.github/workflows/ci-all.yaml
index b0ddbad3495a..53978ed31d1b 100644
--- a/.github/workflows/ci-all.yaml
+++ b/.github/workflows/ci-all.yaml
@@ -98,6 +98,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
 
+      - name: Setup Java
+        if: ${{ inputs.phing_task_phpunit }}
+        uses: actions/setup-java@v6
+        with:
+          # Solr 10 requires Java 21 or later.
+          distribution: temurin
+          java-version: '21'
+
       - name: Configure Apache for PHP ${{ matrix.php-version }}
         if: ${{ inputs.phing_task_phpunit }}
         run: |
diff --git a/.gitignore b/.gitignore
index 4a567fee1e2e..c26c327fd5a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,8 @@
 /downloads
 /Gruntfile.local.js
 /solr/vendor
+# Generated at startup by solr.sh (see solr.sh for details)
+/solr/vufind/biblio/lib/
 /themes/minktest
 /vendor
 ChangeLog
diff --git a/build.xml b/build.xml
index cfa67390022b..e80d1140dd8e 100644
--- a/build.xml
+++ b/build.xml
@@ -52,7 +52,7 @@
   <property name="phpmd_cache_params" value="--cache" />
   <property name="phpunit_command" value="${srcdir}/vendor/bin/phpunit" />
   <property name="phpunit_extra_params" value="" />
-  <property name="composer_version" value="2.7.7" />
+  <property name="composer_version" value="2.9.8" />
   <property name="composer_extra_params" value="" />
   <property name="mink_driver" value="selenium" />
   <property name="screenshot_dir" value="" /><!-- set to a directory name to capture screenshots of failed tests -->
@@ -62,7 +62,7 @@
   <property name="default_test_retry_count" value="5" /><!-- default retry count for Mink tests; increase when tests fail on slow systems -->
   <property name="solr_startup_sleep" value="0" />
   <property name="solr_additional_jvm_options" value="-Dlog4j2.formatMsgNoLookups=true" />
-  <property name="solr_version" value="9.8.1" />
+  <property name="solr_version" value="10.0.0" />
   <property name="solr_port" value="8983" />
   <property name="skip_phpdoc" value="false" />
   <property name="phpdoc_version" value="3.10.0" />
diff --git a/import-marc.sh b/import-marc.sh
index 554273bcc047..dd1612a170a4 100755
--- a/import-marc.sh
+++ b/import-marc.sh
@@ -172,6 +172,10 @@ if [ $REGENERATE_SOLRJ_DIR -eq 1 ]
 then
   for file in $VUFIND_HOME/solr/vendor/server/solr-webapp/webapp/WEB-INF/lib/solr*.jar $VUFIND_HOME/solr/vendor/server/solr-webapp/webapp/WEB-INF/lib/http*.jar
   do
+    # Newer Solr versions (10 and later) no longer ship http*.jar files in the
+    # webapp, so an unmatched glob pattern would be passed through literally by
+    # the shell; only link files that actually exist.
+    [ -e "$file" ] || continue
     ln -s $file $SOLRJ_DIR/`basename "$file"`
   done
 fi
diff --git a/import/browse-indexing.jar b/import/browse-indexing.jar
index e4158b9406c9..6a2743d0be7d 100644
Binary files a/import/browse-indexing.jar and b/import/browse-indexing.jar differ
diff --git a/import/solrmarc_core_3.5.jar b/import/solrmarc_core_3.5.jar
index b6bf536bdf49..fe301d779573 100644
Binary files a/import/solrmarc_core_3.5.jar and b/import/solrmarc_core_3.5.jar differ
diff --git a/solr.sh b/solr.sh
index 61da67955471..4aafc2021e1c 100755
--- a/solr.sh
+++ b/solr.sh
@@ -97,4 +97,33 @@ then
 fi
 
 export SOLR_LOGS_DIR=$SOLR_LOGS_DIR
-"$SOLR_BIN/solr" "$1" ${SOLR_ADDITIONAL_START_OPTIONS} --port "$SOLR_PORT" --solr-home "$SOLR_HOME" -m "$SOLR_HEAP" --user-managed --jvm-opts "-Ddisable.configEdit=true -Dsolr.log=$SOLR_LOGS_DIR -Dsolr.config.lib.enabled=true $SOLR_ADDITIONAL_JVM_OPTIONS"
+
+# The biblio core needs several jars on its classpath. Solr 10 no longer
+# supports <lib/> entries in solrconfig.xml, and the core lib/ directory only
+# picks up jar files directly inside it (not subdirectories). We therefore
+# (re)generate the lib/ symlinks on every start, from:
+#   - the stable jars checked into the VuFind repo, and
+#   - the "analysis-extras" module (e.g. ICU4J for the browse normalizers).
+# Every symlink in lib/ is regenerated, so the directory is a pure runtime
+# artifact (git-ignored) and self-heals across Solr upgrades.
+BIBLIO_LIB="$SOLR_HOME/biblio/lib"
+mkdir -p "$BIBLIO_LIB"
+for link in "$BIBLIO_LIB"/*
+do
+  [ -L "$link" ] && rm -f "$link"
+done
+for jar in "$SOLR_HOME/jars"/*.jar \
+           "$VUFIND_HOME/import"/solrmarc_core_*.jar \
+           "$VUFIND_HOME/import/lib"/marc4j-*.jar
+do
+  [ -e "$jar" ] && ln -sf "$jar" "$BIBLIO_LIB/"
+done
+if [ -d "$VUFIND_HOME/solr/vendor/modules/analysis-extras/lib" ]
+then
+  for jar in "$VUFIND_HOME/solr/vendor/modules/analysis-extras/lib"/*.jar
+  do
+    ln -sf "$jar" "$BIBLIO_LIB/"
+  done
+fi
+
+"$SOLR_BIN/solr" "$1" ${SOLR_ADDITIONAL_START_OPTIONS} --port "$SOLR_PORT" --solr-home "$SOLR_HOME" -m "$SOLR_HEAP" --user-managed --jvm-opts "-Ddisable.configEdit=true -Dsolr.log=$SOLR_LOGS_DIR $SOLR_ADDITIONAL_JVM_OPTIONS"
diff --git a/solr/vufind/authority/conf/solrconfig.xml b/solr/vufind/authority/conf/solrconfig.xml
index 869a2eeea0b6..87be58bc08d3 100644
--- a/solr/vufind/authority/conf/solrconfig.xml
+++ b/solr/vufind/authority/conf/solrconfig.xml
@@ -32,7 +32,7 @@
        that you fully re-index after changing this setting as it can
        affect both how text is indexed and queried.
     -->
-  <luceneMatchVersion>9.11</luceneMatchVersion>
+  <luceneMatchVersion>10.3.2</luceneMatchVersion>
 
   <!-- Use the classic schema style by default for VuFind -->
   <schemaFactory class="ClassicIndexSchemaFactory"/>
diff --git a/solr/vufind/biblio/conf/solrconfig.xml b/solr/vufind/biblio/conf/solrconfig.xml
index 7cb971ba81d2..d1eca6400506 100644
--- a/solr/vufind/biblio/conf/solrconfig.xml
+++ b/solr/vufind/biblio/conf/solrconfig.xml
@@ -32,7 +32,7 @@
        that you fully re-index after changing this setting as it can
        affect both how text is indexed and queried.
     -->
-  <luceneMatchVersion>9.11</luceneMatchVersion>
+  <luceneMatchVersion>10.3.2</luceneMatchVersion>
 
   <!-- Use the classic schema style by default for VuFind -->
   <schemaFactory class="ClassicIndexSchemaFactory"/>
@@ -42,11 +42,6 @@
        If replication is in use, this should match the replication configuration. -->
   <dataDir>${solr.solr.home:./solr}/biblio</dataDir>
 
-  <lib dir="../../../import/lib" regex="marc4j.*\.jar" />
-  <lib dir="../../../import" regex="solrmarc_core.*\.jar" />
-  <lib dir="../../vendor/modules/analysis-extras/lib" regex=".*\.jar" />
-  <lib dir="../jars" regex=".*\.jar" />
-
   <indexConfig>
 
     <useCompoundFile>false</useCompoundFile>
diff --git a/solr/vufind/jars/browse-handler.jar b/solr/vufind/jars/browse-handler.jar
index 9748577147cd..dad7db3b13f8 100644
Binary files a/solr/vufind/jars/browse-handler.jar and b/solr/vufind/jars/browse-handler.jar differ
diff --git a/solr/vufind/reserves/conf/solrconfig.xml b/solr/vufind/reserves/conf/solrconfig.xml
index 125edaee91e1..d3ee476a0577 100644
--- a/solr/vufind/reserves/conf/solrconfig.xml
+++ b/solr/vufind/reserves/conf/solrconfig.xml
@@ -32,7 +32,7 @@
        that you fully re-index after changing this setting as it can
        affect both how text is indexed and queried.
     -->
-  <luceneMatchVersion>9.11</luceneMatchVersion>
+  <luceneMatchVersion>10.3.2</luceneMatchVersion>
 
   <!-- Use the classic schema style by default for VuFind -->
   <schemaFactory class="ClassicIndexSchemaFactory"/>
diff --git a/solr/vufind/solr.xml b/solr/vufind/solr.xml
index e247452da4d6..6102393a7c55 100644
--- a/solr/vufind/solr.xml
+++ b/solr/vufind/solr.xml
@@ -32,13 +32,8 @@
 
     <str name="host">${host:}</str>
     <int name="hostPort">${jetty.port:8983}</int>
-    <str name="hostContext">${hostContext:solr}</str>
-
-    <bool name="genericCoreNodeNames">${genericCoreNodeNames:true}</bool>
 
     <int name="zkClientTimeout">${zkClientTimeout:30000}</int>
-    <int name="distribUpdateSoTimeout">${distribUpdateSoTimeout:600000}</int>
-    <int name="distribUpdateConnTimeout">${distribUpdateConnTimeout:60000}</int>
 
   </solrcloud>
 
diff --git a/solr/vufind/website/conf/solrconfig.xml b/solr/vufind/website/conf/solrconfig.xml
index 67252bfae6ad..3ee484735efb 100644
--- a/solr/vufind/website/conf/solrconfig.xml
+++ b/solr/vufind/website/conf/solrconfig.xml
@@ -32,7 +32,7 @@
        that you fully re-index after changing this setting as it can
        affect both how text is indexed and queried.
     -->
-  <luceneMatchVersion>9.11</luceneMatchVersion>
+  <luceneMatchVersion>10.3.2</luceneMatchVersion>
 
   <!-- Use the classic schema style by default for VuFind -->
   <schemaFactory class="ClassicIndexSchemaFactory"/>