diff --git a/src/se/vidstige/jadb/DeviceWatcher.java b/src/se/vidstige/jadb/DeviceWatcher.java
index 2f219a0..4984f4b 100644
--- a/src/se/vidstige/jadb/DeviceWatcher.java
+++ b/src/se/vidstige/jadb/DeviceWatcher.java
@@ -19,7 +19,7 @@ public class DeviceWatcher implements Runnable {
     }
 
     @SuppressWarnings("squid:S2189") // watcher is stopped by closing transport
-    public void watch() {
+    private void watch() {
         try {
             while (true) {
                 listener.onDetect(connection.parseDevices(transport.readString()));
diff --git a/src/se/vidstige/jadb/SyncTransport.java b/src/se/vidstige/jadb/SyncTransport.java
index 22787fe..8748e6d 100644
--- a/src/se/vidstige/jadb/SyncTransport.java
+++ b/src/se/vidstige/jadb/SyncTransport.java
@@ -45,11 +45,11 @@ public class SyncTransport {
         }
     }
 
-    public int readInt() throws IOException {
+    private int readInt() throws IOException {
         return Integer.reverseBytes(input.readInt());
     }
 
-    public String readString(int length) throws IOException {
+    private String readString(int length) throws IOException {
         byte[] buffer = new byte[length];
         input.readFully(buffer);
         return new String(buffer, StandardCharsets.UTF_8);
diff --git a/src/se/vidstige/jadb/Transport.java b/src/se/vidstige/jadb/Transport.java
index d3a8a93..fd42c8f 100644
--- a/src/se/vidstige/jadb/Transport.java
+++ b/src/se/vidstige/jadb/Transport.java
@@ -47,7 +47,7 @@ class Transport {
         return new String(responseBuffer, StandardCharsets.UTF_8);
     }
 
-    public String getCommandLength(String command) {
+    private String getCommandLength(String command) {
         return String.format("%04x", command.length());
     }
 
diff --git a/src/se/vidstige/jadb/server/AdbProtocolHandler.java b/src/se/vidstige/jadb/server/AdbProtocolHandler.java
index fc71a13..cfb36da 100644
--- a/src/se/vidstige/jadb/server/AdbProtocolHandler.java
+++ b/src/se/vidstige/jadb/server/AdbProtocolHandler.java
@@ -211,7 +211,7 @@ class AdbProtocolHandler implements Runnable {
         return String.format("%04x", command.length());
     }
 
-    public void send(DataOutput writer, String response) throws IOException {
+    private void send(DataOutput writer, String response) throws IOException {
         writer.writeBytes(getCommandLength(response));
         writer.writeBytes(response);
     }