diff --git a/sshkey_man.py b/sshkey_man.py
index e4b0afd..8614867 100644
--- a/sshkey_man.py
+++ b/sshkey_man.py
@@ -84,9 +84,15 @@ class SSHKey:
     def __eq__(self, other: Self) -> bool:
         return self.__value == other._SSHKey__value
 
+    def __ne__(self, other: Self) -> bool | Never:
+        return self.__value != other._SSHKey__value
+
     def __eqcontent__(self, other: Self) -> bool:
         return self.__value.read_text() == other._SSHKey__value.read_text()
 
+    def __neqcontent__(self, other: Self) -> bool:
+        return self.__value.read_text() != other._SSHKey__value.read_text()
+
     def __add__(self, other: Self | ExecutedPath | str):
         raise NotImplementedError