diff --git a/src/git_flow/git.py b/src/git_flow/git.py
index d3392a7..11e23ff 100644
--- a/src/git_flow/git.py
+++ b/src/git_flow/git.py
@@ -38,7 +38,7 @@ class Git:
 
     @staticmethod
     def set_config(config: dict[str, str], file: str | None = None):
-        for key, value in config:
+        for key, value in config.items():
             Git("config", key, value, file=file).exec()
 
     @staticmethod