diff --git a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene99Codec.java b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene912Codec.java
similarity index 93%
rename from inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene99Codec.java
rename to inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene912Codec.java
index 5312a783415..acebe96fecf 100644
--- a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene99Codec.java
+++ b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/HighDimensionLucene912Codec.java
@@ -22,17 +22,17 @@
 import org.apache.lucene.codecs.KnnVectorsFormat;
 import org.apache.lucene.codecs.KnnVectorsReader;
 import org.apache.lucene.codecs.KnnVectorsWriter;
-import org.apache.lucene.codecs.lucene99.Lucene99Codec;
+import org.apache.lucene.codecs.lucene912.Lucene912Codec;
 import org.apache.lucene.codecs.lucene99.Lucene99HnswVectorsFormat;
 import org.apache.lucene.index.SegmentReadState;
 import org.apache.lucene.index.SegmentWriteState;
 
-public class HighDimensionLucene99Codec
-    extends Lucene99Codec
+public class HighDimensionLucene912Codec
+    extends Lucene912Codec
 {
     private final KnnVectorsFormat defaultKnnVectorsFormat;
 
-    public HighDimensionLucene99Codec(int aDimension)
+    public HighDimensionLucene912Codec(int aDimension)
     {
         var knnFormat = new Lucene99HnswVectorsFormat();
         defaultKnnVectorsFormat = new HighDimensionKnnVectorsFormat(knnFormat, aDimension);
diff --git a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/LuceneIndexPool.java b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/LuceneIndexPool.java
index eb51e6927cd..48d689a0cdb 100644
--- a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/LuceneIndexPool.java
+++ b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/index/LuceneIndexPool.java
@@ -152,7 +152,7 @@ public PooledIndex create(Long aKey) throws Exception
         {
             var dir = new MMapDirectory(getIndexDirectory(aKey));
             var iwc = new IndexWriterConfig();
-            iwc.setCodec(new HighDimensionLucene99Codec(embeddingService.getDimension()));
+            iwc.setCodec(new HighDimensionLucene912Codec(embeddingService.getDimension()));
             return new PooledIndex(aKey, dir, new IndexWriter(dir, iwc));
         }
 
diff --git a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/userguide/UserGuideQueryServiceImpl.java b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/userguide/UserGuideQueryServiceImpl.java
index daa46432bbf..db5549845b4 100644
--- a/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/userguide/UserGuideQueryServiceImpl.java
+++ b/inception/inception-assistant/src/main/java/de/tudarmstadt/ukp/inception/assistant/userguide/UserGuideQueryServiceImpl.java
@@ -50,7 +50,7 @@
 
 import de.tudarmstadt.ukp.inception.assistant.config.AssistantProperties;
 import de.tudarmstadt.ukp.inception.assistant.embedding.EmbeddingService;
-import de.tudarmstadt.ukp.inception.assistant.index.HighDimensionLucene99Codec;
+import de.tudarmstadt.ukp.inception.assistant.index.HighDimensionLucene912Codec;
 import de.tudarmstadt.ukp.inception.scheduling.SchedulingService;
 import de.tudarmstadt.ukp.inception.support.SettingsUtil;
 import de.tudarmstadt.ukp.inception.support.json.JSONUtil;
@@ -198,7 +198,7 @@ else if (LOG.isTraceEnabled()) {
     IndexWriter getIndexWriter() throws IOException
     {
         var iwc = new IndexWriterConfig();
-        iwc.setCodec(new HighDimensionLucene99Codec(embeddingService.getDimension()));
+        iwc.setCodec(new HighDimensionLucene912Codec(embeddingService.getDimension()));
         return new IndexWriter(getSharedIndexDirectory(), iwc);
     }
 
diff --git a/inception/inception-dependencies/pom.xml b/inception/inception-dependencies/pom.xml
index d8aff28069f..7aeaf6ff6cc 100644
--- a/inception/inception-dependencies/pom.xml
+++ b/inception/inception-dependencies/pom.xml
@@ -992,6 +992,21 @@
         <artifactId>lucene-analysis-common</artifactId>
         <version>${lucene.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.lucene</groupId>
+        <artifactId>lucene-analysis-nori</artifactId>
+        <version>${lucene.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.lucene</groupId>
+        <artifactId>lucene-analysis-kuromoji</artifactId>
+        <version>${lucene.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.lucene</groupId>
+        <artifactId>lucene-analysis-phonetic</artifactId>
+        <version>${lucene.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.lucene</groupId>
         <artifactId>lucene-queryparser</artifactId>
@@ -1002,6 +1017,16 @@
         <artifactId>lucene-codecs</artifactId>
         <version>${lucene.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.lucene</groupId>
+        <artifactId>lucene-suggest</artifactId>
+        <version>${lucene.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.lucene</groupId>
+        <artifactId>lucene-test-framework</artifactId>
+        <version>${lucene.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.lucene</groupId>
         <artifactId>lucene-backward-codecs</artifactId>
diff --git a/inception/inception-external-search-solr/src/test/resources/solr/core/conf/solrconfig.xml b/inception/inception-external-search-solr/src/test/resources/solr/core/conf/solrconfig.xml
index 392feec28aa..db0373971ed 100644
--- a/inception/inception-external-search-solr/src/test/resources/solr/core/conf/solrconfig.xml
+++ b/inception/inception-external-search-solr/src/test/resources/solr/core/conf/solrconfig.xml
@@ -16,11 +16,17 @@
  limitations under the License.
 -->
 <config>
-  <luceneMatchVersion>6.2.1</luceneMatchVersion>
+  <luceneMatchVersion>9.11.0</luceneMatchVersion>
 
   <dataDir>${solr.data.dir:}</dataDir>
 
-  <schemaFactory class="ClassicIndexSchemaFactory"/>
+  <schemaFactory class="ClassicIndexSchemaFactory" />
+  <!-- 
+    codecFactory is required because Solr 9.7.0 default tries to instantiate Lucene99 codec which
+    has been moved to a different package in Lucene 9.12.1. Note that the LuceneDefaultCodecFactory
+    is not schema-aware - but for our test this is not a problem
+    -->
+  <codecFactory class="solr.LuceneDefaultCodecFactory" />
 
   <indexConfig>
     <lockType>single</lockType>