diff --git a/25-free-agents/tf-25.py b/25-free-agents/tf-25.py
old mode 100644
new mode 100755
diff --git a/26-spreadsheet/tf-26.py b/26-spreadsheet/tf-26.py
old mode 100644
new mode 100755
diff --git a/31-trinity/tf-31.py b/31-trinity/tf-31.py
old mode 100644
new mode 100755