diff --git a/karabiner/assets/complex_modifications/1670850784.json b/karabiner/assets/complex_modifications/1670850784.json
new file mode 100644
index 0000000..bf2dcb0
--- /dev/null
+++ b/karabiner/assets/complex_modifications/1670850784.json
@@ -0,0 +1,181 @@
+{
+  "title": "German Umlaut",
+  "rules": [
+    {
+      "description": "Change option + a/o/u to ä/ö/ü",
+      "manipulators": [
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "a",
+            "modifiers": {
+              "mandatory": [
+                "option"
+              ],
+              "optional": [
+                "caps_lock"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "a"
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        },
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "a",
+            "modifiers": {
+              "mandatory": [
+                "option",
+                "shift"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "a",
+              "modifiers": [
+                "left_shift"
+              ]
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        },
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "o",
+            "modifiers": {
+              "mandatory": [
+                "option"
+              ],
+              "optional": [
+                "caps_lock"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "o"
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        },
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "o",
+            "modifiers": {
+              "mandatory": [
+                "option",
+                "shift"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "o",
+              "modifiers": [
+                "left_shift"
+              ]
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        },
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "u",
+            "modifiers": {
+              "mandatory": [
+                "option"
+              ],
+              "optional": [
+                "caps_lock"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "u"
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        },
+        {
+          "type": "basic",
+          "from": {
+            "key_code": "u",
+            "modifiers": {
+              "mandatory": [
+                "option",
+                "shift"
+              ]
+            }
+          },
+          "to": [
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_option"
+              ]
+            },
+            {
+              "key_code": "u",
+              "modifiers": [
+                "left_shift"
+              ]
+            },
+            {
+              "key_code": "vk_none"
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}
diff --git a/karabiner/karabiner.json b/karabiner/karabiner.json
index 764ef27..22d0a61 100644
--- a/karabiner/karabiner.json
+++ b/karabiner/karabiner.json
@@ -292,6 +292,182 @@
                                 "type": "basic"
                             }
                         ]
+                    },
+                    {
+                        "description": "Change option + a/o/u to ä/ö/ü",
+                        "manipulators": [
+                            {
+                                "from": {
+                                    "key_code": "a",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option"
+                                        ],
+                                        "optional": [
+                                            "caps_lock"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "a"
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            },
+                            {
+                                "from": {
+                                    "key_code": "a",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option",
+                                            "shift"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "a",
+                                        "modifiers": [
+                                            "left_shift"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            },
+                            {
+                                "from": {
+                                    "key_code": "o",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option"
+                                        ],
+                                        "optional": [
+                                            "caps_lock"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "o"
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            },
+                            {
+                                "from": {
+                                    "key_code": "o",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option",
+                                            "shift"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "o",
+                                        "modifiers": [
+                                            "left_shift"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            },
+                            {
+                                "from": {
+                                    "key_code": "u",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option"
+                                        ],
+                                        "optional": [
+                                            "caps_lock"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "u"
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            },
+                            {
+                                "from": {
+                                    "key_code": "u",
+                                    "modifiers": {
+                                        "mandatory": [
+                                            "option",
+                                            "shift"
+                                        ]
+                                    }
+                                },
+                                "to": [
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_option"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "u",
+                                        "modifiers": [
+                                            "left_shift"
+                                        ]
+                                    },
+                                    {
+                                        "key_code": "vk_none"
+                                    }
+                                ],
+                                "type": "basic"
+                            }
+                        ]
                     }
                 ]
             },