diff --git a/Gemfile b/Gemfile
index 9139e1184..002169503 100644
--- a/Gemfile
+++ b/Gemfile
@@ -170,7 +170,7 @@ gem "rails-assets-diaspora_jsxc", "0.1.5.develop.7", source: "https://rails-asse
 
 # Tags
 
-gem "acts-as-taggable-on", "3.5.0"
+gem "acts-as-taggable-on", "5.0.0"
 
 # URIs and HTTP
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 605dd032d..798e80238 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,8 +41,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    acts-as-taggable-on (3.5.0)
-      activerecord (>= 3.2, < 5)
+    acts-as-taggable-on (5.0.0)
+      activerecord (>= 4.2.8)
     acts_as_api (1.0.0)
       activemodel (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -754,7 +754,7 @@ PLATFORMS
 DEPENDENCIES
   active_model_serializers (= 0.9.7)
   activerecord-import (= 0.19.1)
-  acts-as-taggable-on (= 3.5.0)
+  acts-as-taggable-on (= 5.0.0)
   acts_as_api (= 1.0.0)
   addressable (= 2.5.1)
   asset_sync (= 2.2.0)