diff --git a/README.md b/README.md
old mode 100755
new mode 100644
diff --git a/compose.yml b/compose.yml
old mode 100755
new mode 100644
diff --git a/config/jupyterhub_config.py b/config/jupyterhub_config.py
old mode 100755
new mode 100644
diff --git a/services/jupyterhub/Dockerfile.jupyterhub b/services/jupyterhub/Dockerfile.jupyterhub
old mode 100755
new mode 100644
diff --git a/services/jupyterhub/conf/apt-packages.yml b/services/jupyterhub/conf/apt-packages.yml
old mode 100755
new mode 100644
diff --git a/services/jupyterhub/templates/certs/README.md b/services/jupyterhub/templates/certs/README.md
old mode 100755
new mode 100644
diff --git a/services/jupyterhub/templates/certs/certs.yml b/services/jupyterhub/templates/certs/certs.yml
old mode 100755
new mode 100644
diff --git a/start.bat b/start.bat
old mode 100755
new mode 100644