diff --git a/app/javascript/mastodon/components/status_content.js b/app/javascript/mastodon/components/status_content.js
index 549de95fc1..76117f1d92 100644
--- a/app/javascript/mastodon/components/status_content.js
+++ b/app/javascript/mastodon/components/status_content.js
@@ -112,7 +112,7 @@ export default class StatusContent extends React.PureComponent {
   }
 
   onHashtagClick = (hashtag, e) => {
-    hashtag = hashtag.replace(/^#/, '').toLowerCase();
+    hashtag = hashtag.replace(/^#/, '');
 
     if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
       e.preventDefault();
diff --git a/app/lib/formatter.rb b/app/lib/formatter.rb
index 65059efa06..b5f42305fe 100644
--- a/app/lib/formatter.rb
+++ b/app/lib/formatter.rb
@@ -294,7 +294,7 @@ class Formatter
   end
 
   def hashtag_html(tag)
-    "<a href=\"#{encode(tag_url(tag.downcase))}\" class=\"mention hashtag\" rel=\"tag\">#<span>#{encode(tag)}</span></a>"
+    "<a href=\"#{encode(tag_url(tag))}\" class=\"mention hashtag\" rel=\"tag\">#<span>#{encode(tag)}</span></a>"
   end
 
   def mention_html(account)
diff --git a/app/services/batched_remove_status_service.rb b/app/services/batched_remove_status_service.rb
index 27dc460a6b..6df8d4769e 100644
--- a/app/services/batched_remove_status_service.rb
+++ b/app/services/batched_remove_status_service.rb
@@ -80,8 +80,8 @@ class BatchedRemoveStatusService < BaseService
       end
 
       @tags[status.id].each do |hashtag|
-        redis.publish("timeline:hashtag:#{hashtag}", payload)
-        redis.publish("timeline:hashtag:#{hashtag}:local", payload) if status.local?
+        redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}", payload)
+        redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}:local", payload) if status.local?
       end
     end
   end
diff --git a/app/services/fan_out_on_write_service.rb b/app/services/fan_out_on_write_service.rb
index f3e9c855dc..95336ef450 100644
--- a/app/services/fan_out_on_write_service.rb
+++ b/app/services/fan_out_on_write_service.rb
@@ -72,8 +72,8 @@ class FanOutOnWriteService < BaseService
     Rails.logger.debug "Delivering status #{status.id} to hashtags"
 
     status.tags.pluck(:name).each do |hashtag|
-      Redis.current.publish("timeline:hashtag:#{hashtag}", @payload)
-      Redis.current.publish("timeline:hashtag:#{hashtag}:local", @payload) if status.local?
+      Redis.current.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}", @payload)
+      Redis.current.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}:local", @payload) if status.local?
     end
   end
 
diff --git a/app/services/remove_status_service.rb b/app/services/remove_status_service.rb
index a69fce8b85..91c934181b 100644
--- a/app/services/remove_status_service.rb
+++ b/app/services/remove_status_service.rb
@@ -124,8 +124,8 @@ class RemoveStatusService < BaseService
     return unless @status.public_visibility?
 
     @tags.each do |hashtag|
-      redis.publish("timeline:hashtag:#{hashtag}", @payload)
-      redis.publish("timeline:hashtag:#{hashtag}:local", @payload) if @status.local?
+      redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}", @payload)
+      redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}:local", @payload) if @status.local?
     end
   end