diff --git a/build.gradle b/build.gradle
index 0fff5011..de399608 100644
--- a/build.gradle
+++ b/build.gradle
@@ -72,7 +72,7 @@ dependencies {
   //testImplementation 'org.apache.lucene:lucene-test-framework:${luceneVersion}'
   runtimeOnly 'org.locationtech.spatial4j:spatial4j:0.7'
   runtimeOnly 'org.locationtech.jts:jts-core:1.15.0'
-  runtimeOnly 'org.apache.logging.log4j:log4j-core:2.20.0'
+  runtimeOnly 'org.apache.logging.log4j:log4j-core:2.21.0'
 }
 
 
diff --git a/gradle.properties b/gradle.properties
index 80429c01..903fe517 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
-ltrVersion = 2.11.1
-opensearchVersion = 2.11.1
+ltrVersion = 2.15.0
+opensearchVersion = 2.15.0
 luceneVersion = 9.7.0
 ow2Version = 9.6
 antlrVersion=4.11.1
diff --git a/src/main/java/com/o19s/es/explore/ExplorerQuery.java b/src/main/java/com/o19s/es/explore/ExplorerQuery.java
index 76556f0f..efe2fe86 100644
--- a/src/main/java/com/o19s/es/explore/ExplorerQuery.java
+++ b/src/main/java/com/o19s/es/explore/ExplorerQuery.java
@@ -103,7 +103,7 @@ public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float bo
             StatisticsHelper ttf_stats = new StatisticsHelper();
 
             for (Term term : terms) {
-                TermStates ctx = TermStates.build(searcher.getTopReaderContext(), term, scoreMode.needsScores());
+                TermStates ctx = TermStates.build(searcher, term, scoreMode.needsScores());
                 if(ctx != null && ctx.docFreq() > 0){
                     TermStatistics tStats = searcher.termStatistics(term, ctx.docFreq(), ctx.totalTermFreq());
                     df_stats.add(tStats.docFreq());
diff --git a/src/main/java/com/o19s/es/explore/PostingsExplorerQuery.java b/src/main/java/com/o19s/es/explore/PostingsExplorerQuery.java
index 0ee2e930..ad48341c 100644
--- a/src/main/java/com/o19s/es/explore/PostingsExplorerQuery.java
+++ b/src/main/java/com/o19s/es/explore/PostingsExplorerQuery.java
@@ -78,9 +78,8 @@ public int hashCode() {
     @Override
     public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
             throws IOException {
-        IndexReaderContext context = searcher.getTopReaderContext();
         assert scoreMode.needsScores() : "Should not be used in filtering mode";
-        return new PostingsExplorerWeight(this, this.term, TermStates.build(context, this.term,
+        return new PostingsExplorerWeight(this, this.term, TermStates.build(searcher, this.term,
                 scoreMode.needsScores()),
                 this.type);
     }
diff --git a/src/main/java/com/o19s/es/ltr/feature/store/ScriptFeature.java b/src/main/java/com/o19s/es/ltr/feature/store/ScriptFeature.java
index bcf233be..5ff0d856 100644
--- a/src/main/java/com/o19s/es/ltr/feature/store/ScriptFeature.java
+++ b/src/main/java/com/o19s/es/ltr/feature/store/ScriptFeature.java
@@ -336,7 +336,7 @@ static class LtrScriptWeight extends Weight {
 
             if (scoreMode.needsScores()) {
                 for (Term t : terms) {
-                    TermStates ctx = TermStates.build(searcher.getTopReaderContext(), t, true);
+                    TermStates ctx = TermStates.build(searcher, t, true);
                     if (ctx != null && ctx.docFreq() > 0) {
                         searcher.collectionStatistics(t.field());
                         searcher.termStatistics(t, ctx.docFreq(), ctx.totalTermFreq());
diff --git a/src/main/java/com/o19s/es/termstat/TermStatQuery.java b/src/main/java/com/o19s/es/termstat/TermStatQuery.java
index c124f19d..e33efe54 100644
--- a/src/main/java/com/o19s/es/termstat/TermStatQuery.java
+++ b/src/main/java/com/o19s/es/termstat/TermStatQuery.java
@@ -122,7 +122,7 @@ static class TermStatWeight extends Weight {
             // This is needed for proper DFS_QUERY_THEN_FETCH support
             if (scoreMode.needsScores()) {
                 for (Term t : terms) {
-                    TermStates ctx = TermStates.build(searcher.getTopReaderContext(), t, true);
+                    TermStates ctx = TermStates.build(searcher, t, true);
 
                     if (ctx != null && ctx.docFreq() > 0) {
                         searcher.collectionStatistics(t.field());