diff --git a/src/index.ts b/src/index.ts
index eb508589..b47c85ac 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -61,7 +61,7 @@ export default class Help {
     } else if (command = this.config.findCommand(subject)) {
       const name = command.id
       const depth = name.split(':').length
-      topics = topics.filter(t => t.name.startsWith(name) && t.name.split(':').length === depth + 1)
+      topics = topics.filter(t => t.name.startsWith(name + ':') && t.name.split(':').length === depth + 1)
       let title = command.description && this.render(command.description).split('\n')[0]
       if (title) console.log(title + '\n')
       console.log(this.command(command))
@@ -73,7 +73,7 @@ export default class Help {
     } else if (topic = this.config.findTopic(subject)) {
       const name = topic.name
       const depth = name.split(':').length
-      topics = topics.filter(t => t.name.startsWith(name) && t.name.split(':').length === depth + 1)
+      topics = topics.filter(t => t.name.startsWith(name + ':') && t.name.split(':').length === depth + 1)
       console.log(this.topic(topic))
       if (topics.length) {
         console.log(this.topics(topics))