diff --git a/plugins/microsoft-calendar/package.json b/plugins/microsoft-calendar/package.json
index 09bed7ec0731ce..dc9436ba4c7428 100644
--- a/plugins/microsoft-calendar/package.json
+++ b/plugins/microsoft-calendar/package.json
@@ -44,7 +44,7 @@
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
     "@backstage/errors": "workspace:^",
-    "@backstage/theme": "workspace:^",
+    "@backstage/theme": "0.1.1",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
     "@microsoft/microsoft-graph-types": "^2.25.0",