diff --git a/core/session_pool.py b/core/session_pool.py
index 14efbb7..14c1228 100644
--- a/core/session_pool.py
+++ b/core/session_pool.py
@@ -9,6 +9,15 @@ from typing import Dict, Optional, Tuple
 from core.ssh_client import ShellSession, SFTPSession
 
 
+_CRITICAL_KEYS = ('ip', 'port', 'username', 'password', 'type',
+                  'access_key', 'secret_key', 'use_ssl')
+
+
+def _server_changed(old: dict, new: dict) -> bool:
+    """Check if critical connection fields differ."""
+    return any(old.get(k) != new.get(k) for k in _CRITICAL_KEYS)
+
+
 class SessionData:
     """Container for session data including the actual sessions and their metadata."""
     def __init__(self, alias: str, server: dict, key_path: str):
@@ -70,6 +79,11 @@ class SessionPool:
                 self._sessions[alias] = session_data
             else:
                 session_data = self._sessions[alias]
+                # Invalidate if server connection data changed
+                if _server_changed(session_data.server, server):
+                    session_data.cleanup()
+                    session_data.server = server
+                    session_data.key_path = key_path
 
             # Update access time for LRU
             self._update_last_access(alias)
@@ -108,6 +122,11 @@ class SessionPool:
                 self._sessions[alias] = session_data
             else:
                 session_data = self._sessions[alias]
+                # Invalidate if server connection data changed
+                if _server_changed(session_data.server, server):
+                    session_data.cleanup()
+                    session_data.server = server
+                    session_data.key_path = key_path
 
             # Update access time for LRU
             self._update_last_access(alias)
diff --git a/gui/app.py b/gui/app.py
index 3117dca..a762fe4 100644
--- a/gui/app.py
+++ b/gui/app.py
@@ -299,9 +299,19 @@ class App(ctk.CTk):
                 self.sidebar._select(new_alias)
                 self.session_pool.rename_server(alias, new_alias)
             else:
-                info = self._tab_instances.get("info")
-                if info and hasattr(info, "refresh"):
-                    info.refresh()
+                # Data may have changed (IP, port, password) — force reconnect
+                self._force_reconnect(alias)
+
+    def _force_reconnect(self, alias: str):
+        """Force tabs to reconnect after server data changed."""
+        # Invalidate cached SSH/SFTP sessions in pool
+        self.session_pool.disconnect_session(alias)
+        # Reset _current_alias so set_server() bypasses early return
+        for widget in self._tab_instances.values():
+            if getattr(widget, '_current_alias', None) == alias:
+                widget._current_alias = None
+        # Re-trigger server selection (calls set_server on all tabs)
+        self._on_server_select(alias)
 
     def _delete_server(self, alias: str):
         if messagebox.askyesno(t("delete_server"), t("delete_confirm").format(alias=alias)):
diff --git a/releases/ServerManager-v1.9.9-win-x64.exe b/releases/ServerManager-v1.9.9-win-x64.exe
new file mode 100644
index 0000000..00c8b93
Binary files /dev/null and b/releases/ServerManager-v1.9.9-win-x64.exe differ
diff --git a/version.py b/version.py
index b370d8e..537ba19 100755
--- a/version.py
+++ b/version.py
@@ -1,6 +1,6 @@
 """Version info for ServerManager."""
 
-__version__ = "1.9.8"
+__version__ = "1.9.9"
 __app_name__ = "ServerManager"
 __author__ = "aibot777"
 __description__ = "Desktop GUI for managing remote servers"