diff --git a/molgenis-data-annotators/src/main/java/org/molgenis/data/annotation/core/resources/impl/tabix/TabixReader.java b/molgenis-data-annotators/src/main/java/org/molgenis/data/annotation/core/resources/impl/tabix/TabixReader.java
index <HASH>..<HASH> 100644
--- a/molgenis-data-annotators/src/main/java/org/molgenis/data/annotation/core/resources/impl/tabix/TabixReader.java
+++ b/molgenis-data-annotators/src/main/java/org/molgenis/data/annotation/core/resources/impl/tabix/TabixReader.java
@@ -41,8 +41,8 @@ import static java.nio.charset.StandardCharsets.UTF_8;
 
 public class TabixReader
 {
-	public String filename;
-	public BlockCompressedInputStream blockCompressedInputStream;
+	private String filename;
+	private BlockCompressedInputStream blockCompressedInputStream;
 
 	private int mPreset;
 	private int mSc;
@@ -53,7 +53,7 @@ public class TabixReader
 	private String[] mSeq;
 	private TIndex[] mIndex;
 
-	public HashMap<String, Integer> mChr2tid;
+	private HashMap<String, Integer> mChr2tid;
 
 	private static int MAX_BIN = 37450;
 	private static int TAD_MIN_CHUNK_GAP = 32768;
Fix three "Class variable fields should not have public accessibility" vulnerabilities reported by Sonar