diff --git a/material/plugins/group/config.py b/material/plugins/group/config.py
index d9a45ad03..ce7156e4e 100644
--- a/material/plugins/group/config.py
+++ b/material/plugins/group/config.py
@@ -27,12 +27,5 @@ from mkdocs.config.base import Config
 
 # Group plugin configuration
 class GroupConfig(Config):
-    # While the canonical type for this setting is obviously bool, setting it
-    # from environment variables seems to have different effects on different
-    # systems. For instance, setting CI=true seems to correctly work on macOS,
-    # but not on Linux – see https://t.ly/MWj0H.
-    #
-    # Thus, as long as the value evaluates to a truthy or falsy value, the
-    # plugin will work as expected, until we find a better solution.
-    enabled = Type((bool, str, int), default = False)
+    enabled = Type(bool, default = False)
     plugins = Type((list, dict))
diff --git a/src/plugins/group/config.py b/src/plugins/group/config.py
index d9a45ad03..ce7156e4e 100644
--- a/src/plugins/group/config.py
+++ b/src/plugins/group/config.py
@@ -27,12 +27,5 @@ from mkdocs.config.base import Config
 
 # Group plugin configuration
 class GroupConfig(Config):
-    # While the canonical type for this setting is obviously bool, setting it
-    # from environment variables seems to have different effects on different
-    # systems. For instance, setting CI=true seems to correctly work on macOS,
-    # but not on Linux – see https://t.ly/MWj0H.
-    #
-    # Thus, as long as the value evaluates to a truthy or falsy value, the
-    # plugin will work as expected, until we find a better solution.
-    enabled = Type((bool, str, int), default = False)
+    enabled = Type(bool, default = False)
     plugins = Type((list, dict))