diff --git a/Gemfile b/Gemfile
index 115d71101..f56486cad 100644
--- a/Gemfile
+++ b/Gemfile
@@ -36,7 +36,7 @@ gem "sidekiq", "4.2.10"
 
 # Scheduled processing
 
-gem "sidekiq-cron", "0.4.5"
+gem "sidekiq-cron", "0.6.3"
 
 # Compression
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 33c4ba39c..5967ae47e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -188,6 +188,8 @@ GEM
       execjs
       multi_json (>= 1.3)
       rake
+    et-orbi (1.0.5)
+      tzinfo
     ethon (0.10.1)
       ffi (>= 1.3.0)
     excon (0.55.0)
@@ -572,8 +574,6 @@ GEM
       ffi (>= 0.5.0)
     redcarpet (3.4.0)
     redis (3.3.3)
-    redis-namespace (1.5.3)
-      redis (~> 3.0, >= 3.0.4)
     request_store (1.3.2)
     responders (2.4.0)
       actionpack (>= 4.2.0, < 5.3)
@@ -609,8 +609,8 @@ GEM
     ruby-progressbar (1.8.1)
     ruby_dep (1.5.0)
     rubyzip (1.2.1)
-    rufus-scheduler (3.3.4)
-      tzinfo
+    rufus-scheduler (3.4.2)
+      et-orbi (~> 1.0)
     rugged (0.25.1.1)
     safe_yaml (1.0.4)
     sass (3.4.23)
@@ -637,9 +637,8 @@ GEM
       connection_pool (~> 2.2, >= 2.2.0)
       rack-protection (>= 1.5.0)
       redis (~> 3.2, >= 3.2.1)
-    sidekiq-cron (0.4.5)
-      redis-namespace (>= 1.5.2)
-      rufus-scheduler (>= 2.0.24)
+    sidekiq-cron (0.6.3)
+      rufus-scheduler (>= 3.3.0)
       sidekiq (>= 4.2.1)
     sigar (0.7.3)
     simple_captcha2 (0.4.3)
@@ -874,7 +873,7 @@ DEPENDENCIES
   secure_headers (= 3.6.1)
   shoulda-matchers (= 3.1.1)
   sidekiq (= 4.2.10)
-  sidekiq-cron (= 0.4.5)
+  sidekiq-cron (= 0.6.3)
   simple_captcha2 (= 0.4.3)
   simplecov (= 0.12.0)
   sinon-rails (= 1.15.0)