diff --git a/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/CommandExecSession.java b/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/CommandExecSession.java
index 03e82a1..ffea763 100644
--- a/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/CommandExecSession.java
+++ b/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/CommandExecSession.java
@@ -19,7 +19,7 @@ public final class CommandExecSession implements Closeable {
 
     private final ChannelExec channelExec;
 
-    public CommandExecSession(ChannelExec channelExec) {
+    CommandExecSession(ChannelExec channelExec) {
         this.channelExec = channelExec;
     }
 
diff --git a/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/OracleInstanceServerKeyVerifier.java b/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/OracleInstanceServerKeyVerifier.java
index 45373ea..a2b0cb9 100644
--- a/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/OracleInstanceServerKeyVerifier.java
+++ b/src/main/java/net/lamgc/oracle/sentry/oci/compute/ssh/OracleInstanceServerKeyVerifier.java
@@ -23,7 +23,7 @@ public class OracleInstanceServerKeyVerifier implements ServerKeyVerifier {
     private final ComputeInstance instance;
     private final SshAuthInfo info;
 
-    public OracleInstanceServerKeyVerifier(ComputeInstance instance, SshAuthInfo info) {
+    OracleInstanceServerKeyVerifier(ComputeInstance instance, SshAuthInfo info) {
         this.instance = instance;
         this.info = info;
     }