diff --git a/requirements/plugins.txt b/requirements/plugins.txt
index 2cf7cc71ed..9a5e86a293 100644
--- a/requirements/plugins.txt
+++ b/requirements/plugins.txt
@@ -1,14 +1,14 @@
-# change version ranges when upgrading from ulmo
-tutor-android>=21.0.0,<22.0.0
-tutor-cairn>=21.0.0,<22.0.0
-tutor-credentials>=21.0.0,<22.0.0
-tutor-discovery>=21.0.0,<22.0.0
-tutor-deck>=21.0.0,<22.0.0
-tutor-forum>=21.0.0,<22.0.0
-tutor-indigo>=21.0.0,<22.0.0
-tutor-jupyter>=21.0.0,<22.0.0
-tutor-livedeps>=21.0.0,<22.0.0
-tutor-mfe>=21.0.0,<22.0.0
-tutor-minio>=21.0.0,<22.0.0
-tutor-notes>=21.0.0,<22.0.0
-tutor-xqueue>=21.0.0,<22.0.0
+# For Tutor Main, we install plugins from their main branches instead of from PyPI
+tutor-android@git+https://github.com/overhangio/tutor-android@main
+tutor-cairn@git+https://github.com/overhangio/tutor-cairn@main
+tutor-credentials@git+https://github.com/overhangio/tutor-credentials@main
+tutor-deck@git+https://github.com/overhangio/tutor-deck@main
+tutor-discovery@git+https://github.com/overhangio/tutor-discovery@main
+tutor-forum@git+https://github.com/overhangio/tutor-forum@main
+tutor-indigo@git+https://github.com/overhangio/tutor-indigo@main
+tutor-jupyter@git+https://github.com/overhangio/tutor-jupyter@main
+tutor-livedeps@git+https://github.com/overhangio/tutor-livedeps@main
+tutor-mfe@git+https://github.com/overhangio/tutor-mfe@main
+tutor-minio@git+https://github.com/overhangio/tutor-minio@main
+tutor-notes@git+https://github.com/overhangio/tutor-notes@main
+tutor-xqueue@git+https://github.com/overhangio/tutor-xqueue@main
diff --git a/tutor/__about__.py b/tutor/__about__.py
index aa0aa8ee4d..a5becddf8f 100644
--- a/tutor/__about__.py
+++ b/tutor/__about__.py
@@ -10,7 +10,7 @@
 # the main branch.
 # The suffix is cleanly separated from the __version__ in this module to avoid
 # conflicts when merging branches.
-__version_suffix__ = ""
+__version_suffix__ = "main"
 
 # The app name will be used to define the name of the default tutor root and
 # plugin directory. To avoid conflicts between multiple locally-installed