diff --git a/Gemfile b/Gemfile
index 899a283fc..86bd3b6bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -64,7 +64,7 @@ gem "bootstrap-sass",         "3.4.1"
 gem "bootstrap-switch-rails", "3.3.3" # 3.3.4 and 3.3.5 is broken, see https://github.com/Bttstrp/bootstrap-switch/issues/691
 gem "compass-rails",          "3.1.0"
 gem "sass-rails",             "5.0.7"
-gem "sprockets-rails",        "3.2.2"
+gem "sprockets-rails",        "3.4.2"
 
 # Database
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8dc0247c6..f63d70a76 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -703,9 +703,9 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.2)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     ssrf_filter (1.0.7)
     state_machines (0.5.0)
@@ -915,7 +915,7 @@ DEPENDENCIES
   simple_captcha2 (= 0.5.0)
   simplecov (= 0.21.2)
   sinon-rails (= 1.15.0)
-  sprockets-rails (= 3.2.2)
+  sprockets-rails (= 3.4.2)
   string-direction (= 1.2.2)
   terser (= 1.1.10)
   timecop (= 0.9.4)