diff --git a/pkg/healthcheck/reposize.go b/pkg/healthcheck/reposize.go
index bb69670..939adb8 100644
--- a/pkg/healthcheck/reposize.go
+++ b/pkg/healthcheck/reposize.go
@@ -34,7 +34,7 @@ func RepoSize(confSize float64) error {
 		}
 	}
 	if sum > int(confSize*1024) {
-		return fmt.Errorf("Repository larger than %.1f Mib. Please clean up or contact the teaching team.", confSize)
+		return fmt.Errorf("Repository larger than %.1f MiB. Please clean up or contact the teaching team.", confSize)
 	}
 	return nil
 }